The German Sturmgewehr 44 The Germans were the first to pioneer the concept, during World War II, based upon research that showed that most firefights happen within 400 meters and that contemporary rifles were over-powered for most small arms combat. They would soon develop a select-fire intermediate powered rifle combining the firepower of a submachine gun with the range and accuracy of a rifle.
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The result was the, which the Germans produced in large numbers; approximately half a million were made. It fired a new and revolutionary intermediate powered cartridge, the.
This new cartridge was developed by shortening the standard round and giving it a lighter 125-grain bullet, that limited range but allowed for more controllable automatic fire. A smaller lighter cartridge also allowed soldiers to carry more ammunition 'to support the higher consumption rate of automatic fire.' The Sturmgewehr 44 features an inexpensive, easy-to-make, stamped steel design and a 30-round detachable box magazine. 'This weapon was the prototype of all successful automatic rifles. Characteristically (and unlike previous rifles and the M-14) it had a straight stock with the barrel under the gas cylinder to reduce the turning moment of recoil of the rifle in the shoulder and thus help reduce the tendency of shots to climb in automatic fire. The barrel and overall length were shorter than a traditional rifle and it had a pistol grip to hold the weapon more securely in automatic fire.
The principle of this weapon — the reduction of muzzle impulse to get usable automatic fire within the actual ranges of combat — was probably the most important advance in small arms since the invention of smokeless powder.' AK-47 Like the Germans, the Soviets were influenced by experience showing most combat happens within 400 meters and that their soldiers were consistently outgunned by heavily armed German troops, especially those armed with the assault rifles.
On July 15, 1943, a Sturmgewehr was demonstrated before the. The Soviets were so impressed with the Sturmgewehr, that they immediately set about developing an intermediate caliber automatic rifle of their own, to replace the badly outdated bolt-action rifles and submachine guns that armed most of the Soviet Army. An AK-47 with machined receiver The Soviets soon developed the cartridge, the semi-automatic and the. Shortly after World War II, the Soviets developed the AK-47 assault rifle, which would quickly replace the SKS in Soviet service. The AK-47 was finalized, adopted and entered widespread service in the Soviet army in the early 1950s. Its firepower, ease of use, low production costs, and reliability were perfectly suited for the Red Army's new mobile warfare doctrines. In the 1960s, the Soviets introduced the, itself an AK-47 type weapon with a bi-pod, a stronger receiver, and a longer, heavier barrel that would eventually replace the RPD light machine gun.
M1 Garand and M1 carbine On the other hand, the U.S. Army was influenced by combat experience with semi-automatic weapons such as the and, which enjoyed a significant advantage over enemies armed primarily with bolt-action rifles.
Although U.S. Army studies of World War II combat accounts had very similar results to that of the Germans and Soviets, the U.S. Army failed to recognize the importance of the assault rifle concept, and instead maintained its traditional views and preference for high-powered semi-automatic rifles. At the time, the U.S. Army believed that the Sturmgewehr 44 was 'intended in a general way to serve the same purpose as the U.S. Carbine' and was in many ways inferior to the M1 carbine, and was of 'little importance'.
After World War II, the United States military started looking for a single automatic rifle to replace the,. However, early experiments with select-fire versions of the M1 Garand proved disappointing. During the, the select-fire largely replaced the in US service and became the most widely used Carbine variant. However, combat experience suggested that the round was under-powered.
American weapons designers reached the same conclusion as the Germans and Soviets: an intermediate round was necessary, and recommended a small-caliber, high-velocity cartridge. However, senior American commanders having faced fanatical enemies and experienced major logistical problems during WWII and the Korean War, insisted that a single powerful.30 caliber cartridge be developed, that could not only be used by the new automatic rifle, but by the new (GPMG) in concurrent development. This culminated in the development of the cartridge. The United States Army then began testing several rifles to replace the obsolete M1 Garand. Springfield Armory's T44E4 and heavier T44E5 were essentially updated versions of the Garand chambered for the new 7.62 mm round, while Fabrique Nationale submitted their FN FAL as the T48. Entered the competition late, hurriedly submitting several prototype rifles in the fall of 1956 to the United States Army's Springfield Armory for testing.
AR-10 rifle The AR-10 featured an innovative straight-line barrel/stock design, forged aluminum alloy receivers and with stocks. It had rugged elevated sights, an oversized aluminum and, and an adjustable gas system. The final prototype, featured an upper and lower receiver with the now-familiar hinge and takedown pins, and the charging handle was on top of the receiver placed inside of the carry handle. For a 7.62mm NATO rifle, the AR-10 was incredibly lightweight at only 6.85 lbs. Initial comments by Springfield Armory test staff were favorable, and some testers commented that the AR-10 was the best lightweight automatic rifle ever tested by the Armory.
M14 rifle In the end the United States Army chose the T44 now called the which was an improved M1 Garand with a 20-round magazine and automatic fire capability. Also adopted the general purpose machine gun (GPMG). Its NATO partners adopted the and rifles, as well as the and GPMGs. M16 rifle The first confrontations between the AK-47 and the M14 came in the early part of the.
Battlefield reports indicated that the M14 was uncontrollable in full-auto and that soldiers could not carry enough ammo to maintain fire superiority over the AK-47. And, while the M2 Carbine offered a high rate of fire, it was under-powered and ultimately outclassed by the AK-47. A replacement was needed: A medium between the traditional preference for high-powered rifles such as the M14, and the lightweight firepower of the M2 Carbine. As a result, the Army was forced to reconsider a 1957 request by General Willard G. Wyman, commander of the U.S. Continental Army Command (CONARC) to develop a.223 caliber (5.56 mm) select-fire rifle weighing 6 lbs (2.7 kg) when loaded with a 20-round magazine. The 5.56mm round had to penetrate a standard U.S.
At 500 yards (460 meters) and retain a velocity in excess of the speed of sound, while matching or exceeding the wounding ability of the.30 Carbine cartridge. An M16A1 with 30-round magazine This request ultimately resulted in the development of a scaled-down version of the, called rifle. However, despite overwhelming evidence that the AR-15 could bring more firepower to bear than the M14, the Army opposed the adoption of the new rifle.
In January 1963, Secretary of Defense Robert McNamara concluded that the AR-15 was the superior weapon system and ordered a halt to M14 production. At the time, the AR-15 was the only rifle available that could fulfill the requirement of a universal infantry weapon for issue to all services.
After modifications (most notably, the charging handle was re-located from under the carrying handle like AR-10 to the rear of the receiver), the new redesigned rifle was subsequently adopted as the M16 Rifle. '(The M16) was much lighter compared to the M14 it replaced, ultimately allowing Soldiers to carry more ammunition. The air-cooled, gas-operated, magazine-fed assault rifle was made of steel, aluminum alloy and composite plastics, truly cutting-edge for the time. Designed with full and semi-automatic capabilities, the weapon initially did not respond well to wet and dirty conditions, sometimes even jamming in combat. After a few minor modifications, the weapon gained in popularity among troops on the battlefield.' Despite its early failures the M16 proved to be a revolutionary design and stands as the longest continuously serving rifle in American military history.
It has been adopted by many U.S. Allies and the cartridge has become not only the NATO standard, but 'the standard assault-rifle cartridge in much of the world.' It also led to the development of small-caliber high-velocity service rifles by every major army in the world, including the USSR and People's Republic of China.
It is a benchmark against which other assault rifles are judged. Manufacturing philosophies M16. M16A1 rifle (top) is compared to a Soviet AKMS rifle. The M16 is a select-fire, 5.56×45mm, air-cooled, gas-operated, magazine-fed rifle, with a rotating bolt and straight-line recoil design. It was designed above all else to be a lightweight assault rifle, and to fire a new lightweight, high velocity small caliber cartridge to allow the soldier to carry more ammunition.
It was designed to be manufactured with the extensive use of aluminium and synthetic materials by state of the art automated machinery. The M16 is a, easily configured as an, a, a and an. It is easy to assemble, modify and repair using a few simple hand tools, and a flat surface to work on. At peak production, manufacturing capacity was approximately 333,000 units per year The M16 continues to benefit from every advance in the CNC field. Which allows more and more small manufacturers to mass-produce M16s and semi-automatic type rifles. The M16's aluminum lower receivers may be.
Their receivers may also be made from titanium and a variety of other metallic alloys, composites or polymers. If necessary, the M16 can be machined from a billet of steel and fitted with wooden furniture. The M16's internal components such as the bolt carrier group and charging handle may also be made of titanium. The M16's aluminum receiver and other parts may even be, allowing 'people with no gunsmith training to assemble a working assault rifle at home'. This makes the M16 ideal for, spread among many small manufacturers around the country, using a variety of materials and manufacturing methods; this ensures it would be nearly impossible to disrupt U.S. M16 rifle production in the case of a major conflict. As of 2015, the United States military buys M4 Carbines for $647 (USD) per unit.
Approximately 8 million M16 type rifles have been made worldwide. M16A1 rifle (top) is compared to a Soviet AKMS rifle. The two rifles are disassembled into groups. The AK-47 is a select-fire, 7.62×39mm, air-cooled, long-stroke-piston gas-operated, magazine-fed rifle, with a rotating bolt. It was designed to be a simple, reliable automatic rifle that could be manufactured quickly and cheaply, using mass production methods that were state of the art in the during the late 1940s. The AK-47's barrel and bolt were milled out of a. Its was originally designed to be stamped from sheet metal with a milled trunnion insert.
However, there were many difficulties during the initial phase of production causing high rejection rates due to faulty receivers. Instead of halting production, a heavy forged steel machined receiver was substituted for the sheet metal receiver. This was a more costly and time consuming process, but advanced the program's development and accelerated production. The AK's furniture was simply made out of wood, which was a non-strategic material, and perfectly fits the Soviet manufacturing philosophy, where large manufacturing plants produce basic weapons in very large quantities.
In 1959, the sheet metal stamping process was perfected, simplifying production and reducing the weight of the rifle from 3.87 kg (8.5 lb) to 2.93 kg (6.5 lb) without magazine. Most of the AK type rifles in use today are of this lighter stamped-steel variety. Over time, AK production has been simplified through the use of rivets, spot welding and by further reducing the number of machined parts. Current model AK's are made using modern manufacturing processes and have many component parts produced. This method gives a detailed and accurate product with excellent metallurgical properties. They come in 7.62×39mm , 5.45×39mm and 5.56×45mm , with cold hammer forged barrels.
They are also made with the use of synthetic/plastic furniture, such as folding stocks, handguards and pistol-grips. At peak production, (formerly ) can produce around 95 units per hour (about 832,000 units per year). Because of its stamped-steel design it is not possible to manufacture the AK-47 series efficiently in small plants, due to the large amount of metal stamping equipment needed for mass production. However, the milled-steel AK-47 has spawned a cottage industry of sorts and has been copied and manufactured (one gun at a time) in small shops around the world. As of 2014, Kalashnikov Concern sells the AK-103 at a government price of $150 to $160 (USD) per unit. There are places around the world where an AK-47 type rifle can be purchased on the 'for as little as $6, or traded for a chicken or a sack of grain.'
Approximately 100 million AK-47 type rifles have been made worldwide. Current M4A1 carbine with detachable carrying handle. Ergonomics 'The AR-15/M16-series rifles are considered the finest human-engineered assault rifles in the world.' The M16 is ergonomically superior to the AK-47 in most respects. It is much easier and faster to change magazines and get the M16 back into action than with the AK-47.
This is due to several factors, such as perfectly located magazine release and bolt release buttons, a flared magazine well for fast magazine insertions, and the ability to simply insert the magazine into the M16 in a conventional manner, rather than the 'rock and lock' method required with the AK-47. In addition, it is easier for an M16 user to keep the strong hand on the pistol-grip and sights on target while performing magazine changes than with the AK-47. The M16 has a well designed safety lever located on the left side of the weapon that is easily manipulated by the user's thumb while maintaining a strong hold on the pistol-grip. With the AK-47 the safety is a large lever on the right side of the weapon that is not at all easy to manipulate. 'It is slow, uncomfortable and sometimes stiff to operate.' For most users, the hand must come off the pistol-grip to either apply or disengage the safety.
It also makes a 'loud and distinctive click' when used. While the fire selector 'is considered by many as the main drawback of the whole AK design', its most frequently criticized feature is its trigger mechanism. 'The Kalashnikov trigger system, conceptually derived from that of the U.S.30 M1 Garand rifle, is all too often plagued with an objectionable, and sometimes quite painful, 'trigger slap' and a creepy and unpredictable trigger pull.' M16 AK-47 Carrying handle The M16's most distinctive ergonomic feature is the carrying handle and rear sight assembly on top of the receiver. Current issue M16A4s and M4s have detachable carrying handles and use which allow for the use of various scopes and sighting devices. The AK-47 does not have a carrying-handle. Fire selector The fire selector is located on the left side of the rifle just above the pistol grip and is rotated by the shooter's right thumb.
When the selector points forward = safe, up = semi-auto and backward = full-auto or burst. To use, the selector is rotated 90 degrees clockwise (down and forward) into the semi-auto position and then rotated an additional 90 degrees clockwise (forward and up) into the full-auto or burst position. To return to safe the selector is then rotated 180 degrees counter-clockwise (down, backward and up).
Some M16 type rifles also have an ambidextrous fire selector on the right side of the receiver, designed to be operated by a left-handed shooter's thumb. This selector mirrors its opposite and functions as describe above. The fire selector is a large lever located on the right side of the rifle; it acts as a dust-cover and prevents the charging handle from being pulled fully to the rear when it is on safe. It is operated by the shooter's right fore-fingers and it has 3 settings: up = safe, center = full-auto and down = semi-auto. The reason for this is that, when under stress, a soldier will push the selector lever down with considerable force bypassing the full-auto stage and setting the rifle to semi-auto.
To set the AK-47 to full-auto requires the deliberate action of centering the selector lever. Some AK-47 type rifles also have a small vertical selector lever on the left side of the receiver just above the pistol grip. This lever is operated by the shooter's right thumb and has three settings: forward = safe, center = full-auto and backwards = semi-auto. Charging handle The charging handle is located on top of the receiver, below and to the rear of the rear sight/carrying handle. To chamber, simply insert a loaded magazine straight into the magazine well, then pull the cocking handle back and release. The charging handle does not reciprocate while firing.
The charging handle is located on the right side of the receiver. To chamber, simply rock a loaded magazine into the magazine well in a forward to back motion, then pull the cocking handle back and release.
The charging handle reciprocates while firing. Magazine release The magazine release is a push button, located on the right side of the receiver in front of the trigger.
To reload, the magazine release is pushed in, the empty magazine falls out and a loaded magazine is then inserted straight into the magazine well. The magazine release is a lever located directly in front of and just below the trigger guard. To reload push the magazine release lever forward, the empty magazine is removed and a loaded magazine is then rocked into the magazine well in a forward to back motion. Bolt-stop/release The bolt-stop/release is located on the left side of the receiver and the bolt-carrier-assembly locks back after the last shot. After reloading, the bolt-stop is pushed, the bolt-carrier-assembly is released, and the rifle is chambered and ready to fire. Also, leaving the bolt open for as long as possible aids in cooling and prevent cartridges from '.' Does not have a bolt-stop/release and does not lock back on the last shot.
After reloading, simply pull back and release the charging handle, and the rifle is chambered and ready to fire. Forward-assist The M16A1 and later models have a separate forward-assist on the right side to the rear of the receiver which is operated by pushing it forward. The charging handle also acts as a forward assist which is operated by pushing it forward. Dust cover Has a spring-loaded dust-cover, which opens when the rifle is fired or chambered.
The dust-cover must be closed manually. The fire selector doubles as a dust-cover when set to 'safe'.
Trigger-pull pull weight of 5.5 to 9.0 pounds; creep of.04 to.05 inches; mechanical energy of.22 to.45 inch pounds pull weight of 3.0 to 7.0 pounds; creep of.15 inches; mechanical energy of.45 to 1.05 inch pounds Trigger-guard The M16s trigger-guard can be lowered to allow the trigger to be pulled while wearing winter mittens. The AK-47s trigger-guard is fixed and 'does not lend itself well to trigger operation wearing heavy gloves.' However the AK-47's trigger guard is larger and has more room inside it than other similar weapons, somewhat mitigating the issue. Cartridge deflector To prevent hot shell casings from hitting a left handed shooter's face, older M16s had a plastic cartridge deflector attachment that is mounted in the carrying handle. Current model M16s have a cartridge deflector bump built into the upper receiver. The AK-47 has no need for a cartridge deflector, as it ejects spent shell casings to the right at a forward and upward angle. Forestocks The M16 gets extremely hot when fired for prolonged periods.
However, early model M16s use a large well-insulated triangular shaped forestock to protect the shooter's hands. The M16A2 and later models use rounded forestocks, that are stronger, more ergonomic and better insulated. The AK-47 also gets extremely hot when fired for prolonged periods.
However, the AK-47 has a small poorly-insulated fore-stock that overheats quickly making the AK hard to handle. The AK-47's wooden fore-stocks have even been known to catch fire if magazines are shot quickly enough on full-auto. Some older AK type rifles have which make it easier to control and cooler to the touch making the AK easier to handle as it overheats. Collapsing buttstocks The M16 has variants with shortened barrels and adjustable telescoping buttstocks.
The AK-47 has variants with both standard and shortened barrels, and both under- and side-folding buttstocks. Recoil With the proper mind-set, training and practice, soldiers armed with both the AK-47 and M16 are quite deadly. However, the M16's direct impingement gas operation system, straight-line recoil design and smaller caliber give it less than the AK-47 and makes it easier to control in full-auto.
'The (M16's) Stoner system provides a very symmetric design that allows straight line movement of the operating components. This allows recoil forces to drive straight to the rear.
Instead of connecting or other mechanical parts driving the system, high pressure gas performs this function, reducing the weight of moving parts and the rifle as a whole.' The M16's straight-line recoil design, where the recoil spring is located in the stock directly behind the action, and serves the dual function of operating spring and recoil buffer. The stock being in line with the bore also reduces muzzle rise, especially during automatic fire. Because recoil does not significantly shift the point of aim, faster follow-up shots are possible and user fatigue is reduced. Also, current model M16 flash-suppressors also act as compensators to reduce recoil further. With the AK-47's, the piston is mechanically fixed to the bolt group and moves through the entire operating cycle.
The primary disadvantage to this system is the disruption of the point of aim due to the center of mass changing during the action cycle and energetic and abrupt stops at the beginning and end of bolt carrier travel. However, the AK-47's heavier weight and slower rate-of-fire do a good job of mitigating any disadvantage. In addition, newer AK-47 type rifles use a to reduce recoil.
Some AK type rifles also have to improve handling characteristics and to counter the effects of. Free Recoil M16 AK-47 momentum 40.4 lb-fps 54.3 lb-fps velocity 5.1 fps 5.2 fps energy 3.2 ft-lbs 4.4 ft-lbs Notes: is mathematical equation calculated by using the rifle weight, bullet weight, muzzle velocity and charge weight. It is that which would be measured if the rifle were fired suspended from strings, free to recoil. As mentioned above, a rifle's perceived recoil is also dependent on many other factors which are not readily quantified. M16A4/M203 Note: sights on Range and accuracy A brief comparison between cartridges reveals that the M16's lighter, higher-velocity cartridge has much better range and accuracy than the AK-47's heavier cartridge. NATO E-type Silhouette Target Single-shot hit-probability on Crouching Man (E-Silhouette) Target Rifle Caliber Hit-probability (With no range estimation or aiming errors) 50 meters 100 meters 200 meters 300 meters 400 meters 500 meters 600 meters 700 meters 800 meters M16A1 100% 100% 100% 100% 96% 87% 73% 56% 39% AK-47 100% 100% 99% 94% 82% 67% 54% 42% 31% Terminal ballistics A brief comparison between cartridges reveals that the AK-47's heavier cartridge has much better penetration than the M16's lighter, higher-velocity cartridge.
However, it also reveals that the M16's lighter, higher-velocity 5.56mm bullet has a tendency to fragment on impact causing larger wounds than the AK-47's heavier 7.62mm bullet, which does not fragment on impact. M16 5.56×45mm The AK-47's heavier 7.62×39mm round has superior penetration when compared to the M16's lighter 5.56×45mm round and is better in circumstances where a soldier has to shoot through heavy foliage, walls or a common vehicle's metal body and into an opponent attempting to use these things as cover. The 7.62×39mm M43 projectile does not generally fragment in soft tissue and has an unusual tendency to remain intact even after making contact with bone. The 7.62×39mm round produces significant wounding in cases where the bullet tumbles in tissue, but produces relatively minor wounds in cases where the bullet exits before beginning to yaw. In the absence of yaw, the M43 round can pencil through tissue with relatively little injury and its wounding potential is limited to the small permanent wound channel the bullet itself makes. The original ammunition for the M16 was the 5.56×45mm M193 round.
When fired from a 20' barrel at ranges of up to 100 meters, the thin-jacketed lead-cored round traveled fast enough (above 2900 ft/s) that the force of striking a human body would cause the round to yaw (or tumble) and fragment into about a dozen pieces of various sizes thus created wounds that were out of proportion to its caliber. These wounds were much larger than those produced by AK-47 and they were so devastating that many considered the M16 to be an inhumane weapon. As the 5.56mm round's velocity decreases, so does the number of fragments that it produces. The 5.56mm round does not normally fragment at distances beyond 200 meters or at velocities below 2500 ft/s, and its lethality becomes largely dependent on shot placement.
In March 1970, the U.S. Recommended that all forces adopt the cartridge.
This shift represented a change in the philosophy of the military's long-held position about caliber size. By the mid 1970s, other armies were looking at M16-style weapons. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977.
Offered the 5.56×45mm M193 round, but there were concerns about its penetration in the face of the wider introduction of. In the end the Belgian 5.56×45mm SS109 round was chosen ( 4172) in October 1980. The SS109 round was based on the U.S. Cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters). Due to its design and lower muzzle velocity (about 3110 ft/s) the Belgian SS109 round is considered more humane because it is less likely to fragment than the U.S.
The NATO 5.56×45mm standard ammunition produced for U.S. Forces is designated. Most, if not all, of the 7.62×39mm ammunition found today is of the upgraded M67 variety. This variety deleted the steel insert, shifting the center of gravity rearward and allowing the projectile to destabilize (or yaw) at about 3.3 in (8.4 cm), nearly 6.7 in (17 cm) earlier in tissue than the M43 round. This change also reduces penetration in ballistic gelatin to ≈25 in (64 cm) for the newer M67 round verses ≈29 in (74 cm) for the older M43 round. However, like the M43, the wounding potential of M67 is mostly limited to the small permanent wound channel the bullet itself makes, especially when the bullet yaws (tumbles). There is now relative parity between the wounding capacity of the M67 and the current M855 5.56×45mm round.
However, there have been repeated and consistent reports of the M855's inability to wound effectively (i.e. Fragment) when fired from the short barreled M4 carbine (even at close ranges). The M4's 14.5' barrel length reduces muzzle velocity to about 2900 ft/s. This reduced wounding ability is one reason that, despite the Army's transition to short-barrel M4's, the Marine Corps has decided to continue using the M16A4 with its 20″ barrel as the 5.56×45mm M855 is largely dependent upon high velocity in order to wound effectively. In 2003, the U.S. Army contended that the lack of lethality of the 5.56×45mm was more a matter of perception than fact.
With good shot placement to the head and chest, the target was usually defeated without issue. The majority of failures were the result of hitting the target in non-vital areas such as extremities.
However, a minority of failures occurred in spite of multiple hits to the chest. In 2006, a study found that 20% of soldiers using the M4 Carbine wanted more lethality or stopping power. In June 2010, the United States Army announced it began shipping its new 5.56mm, lead-free, M855A1 Enhanced Performance Round to active combat zones. This upgrade is designed to maximize performance of the 5.56×45mm round, to extend range, improve accuracy, increase penetration and to consistently fragment in soft-tissue when fired from not only standard length M16s, but also the short-barreled M4 carbines. Army was so impressed with the M855A1 EPR round that they also developed the 7.62×51mm M80A1 EPR version.
During the 1990s, the Russians developed the in 5.56×45mm NATO for the world export market. In addition, Bulgaria, Hungary, Poland and Yugoslavia (i.e. Serbia) have also rechambered their locally produced AK variants to 5.56mm NATO. And, Finland, Israel, South Africa and Sweden have made AK type rifles in 5.56×45mm since the 1970s. Modern service rifle cartridges cases: (left to right) 7.62×54mmR, 7.62×51mm NATO, 7.62×39mm M43, 5.56×45mm NATO, 5.45×39mm M74. Firepower Rates of fire Both the AK-47 and the M16 are weapons capable of firing in semi-automatic and full-auto, or semi-auto and 3-round-burst for the later model M16s. However, the semi-auto and 3-round-burst capability of the M16A2 and M4 models have less combat capability than their predecessors or AK-47 type rifles.
This is due to the elimination of full-auto mode of fire In addition, the burst mechanism does not recycle; if one or two rounds are fired because the trigger is not held long enough, the next pull of the trigger will not result in a three-round burst, but will result in one or two shots being fired. The M4A1 and HK416 have abandoned the 3-round-burst capability and returned to the more traditional semi-automatic and full-auto modes of fire, while the M16A4 retains the 3-round burst mode. Rifle Rate of fire Full-auto cyclical Full-auto practical 3-round-burst practical. Semi-auto practical Sustained. AK-47 600 rpm 100 rpm NA 40 rpm 12 to 15 rpm M16 700–950 rpm 150 rpm 90 rpm 45 rpm 12 to 15 rpm Note.: The AK-47 does not have a three-round burst capability. The M16A2 and M4 models have replaced the full-auto mode of fire with a three-round burst capability. Note.: Both the AK-47 and the M16 will overheat fairly quickly under normal combat conditions and have a sustained rate of fire as low as 12 to 15 rounds per minute (about the same as a bolt-action rifle).
Available firepower The standard magazine capacity for both the AK-47 and M16 type rifles is 30 rounds, although lower and higher capacity magazines are available for both systems. However, the single most limiting factor in terms of firepower is the amount of ammunition that a soldier can carry. A soldier armed with an M16 can carry far more ammo than a soldier armed with an AK-47. Assuming a maximum 10 kilogram ammo-load. Magazine Weight of loaded magazine Magazine capacity Max. AK-47 with Kalashnikov grenade launcher mounted on the muzzle.
Accessories Neither the AK-47 nor the M16 were designed to mount accessories, except of course for their respective bayonets and a simple clamp type bipod for the M16. However, with the advent of the and by sheer happenstance, the M16 has proven itself to be a remarkably adaptable weapon system, capable of mounting a wide range of accessories, including grenade launchers, fore-grips, removable carry handle/rear sight assemblies, bipods, laser systems, electronic sights, night vision, tactical lights, etc. The AK-47 can also use Picatinny rail mounted accessories, although its design and smaller fore-stock make it less adaptable. In addition, the M16 is 'the Swiss Army knife of rifles' a modular weapon system whose components can be arranged in a variety of different configuration.
For example, an M16A2 with its standard iron sights and a standard fore-stock can be easily converted, in a matter of seconds and without the use of tools to an M16A4 with Picatinny rails, optical sights and a variety of accessories. This is accomplished by simply pushing in two pins, removing the A2 upper receiver/barrel and replacing it with an A4 upper receiver/barrel. Or, an M16A4 Rifle can be converted to an M4 Carbine in a few minutes by replacing the upper receiver/barrel and using simple hand-tools to replace the fixed buttstock with a telescoping buttstock. As such, the M16 can be easily converted into different calibers and different types of weapons.
The AK-47 has no such capability. AKMS with commercial Picatinny rail fore-stock and folding pistol-grip attachment Bayonets Today, are rarely used in combat. However, both the AK-47 and M16 retain bayonet lugs and bayonets are still issued. Also, bayonets are still used for controlling prisoners and as a weapon of 'last resort'.
In addition, some authorities have concluded that bayonets serve as useful training aids in building and increasing desired aggression in troops. The M16 is 44.25 inches (1124mm) long with an attached.
The M7 bayonet is based on earlier designs such as the, & bayonets, all of which are direct descendants of the and have spear-point blade with a half sharpened secondary edge. The newer has a clip-point blade with saw teeth along the spine, and can be used as a multi-purpose knife and wire-cutter when combined with its scabbard. The current USMC bears a resemblance to the Marines' iconic fighting knife with serrations near the handle. The AK is 40.15 inches (1020mm) long with an AKM type bayonet attached.
The AK-47 has an adequate but unremarkable bayonet. However, the AKM Type I bayonet (introduced in 1959) was a revolutionary design. It has a Bowie style (clip-point) blade with sawteeth along the spine, and can be used as a multi-purpose knife and wire-cutter when combined with its steel scabbard. This design was copied by other nations and formed the basis of the US M9 bayonet. The AK-74 bayonet (introduced in 1983) represents a further refinement of the AKM bayonet. 'It introduced a radical blade cross-section, that has a flat milled on one side near the edge and a corresponding flat milled on the opposite side near the false edge. The blade has a new spear point and an improved one-piece molded plastic grip making it a more effective fighting knife.
It also has saw-teeth on the false edge and the usual hole for use as a wire-cutter. Some Chinese AK type rifles such as the include an integral folding spike bayonet, similar to the rifle. M16 direct impingement gas system The AK-47 has always enjoyed a reputation for rugged reliability and has a malfunction rate of one per 1000 rounds fired. It uses a, where the gas is sent from the barrel to push a piston attached to the bolt carrier, thus operating the action. The gas tube is fairly large and is visible above the barrel with ports or vents to allow the excess 'dirty' gas to escape without affecting the action. The AK-47 is often built with generous clearances, allowing it to function easily in a dirty environment with little or no maintenance. This makes it reliable but less accurate.
The M16 has always had a reputation for poor reliability and has a malfunction rate of two per 1000 rounds fired. The M16 uses a unique gas powered operating system. 'This gas operating system works by passing high pressure propellant gasses tapped from the barrel down a tube and into the carrier group within the upper receiver, and is commonly but incorrectly referred to as a '.
The gas expands within a donut shaped gas cylinder within the carrier. Because the bolt is prevented from moving forward by the barrel, the carrier is driven to the rear by the expanding gasses and thus converts the energy of the gas to movement of the rifle’s parts. The bolt bears a piston head and the cavity in the bolt carrier is the piston sleeve. It is more correct to call it an 'internal piston' system.' This design is much lighter and more compact than a gas-piston design.
However, this design requires that combustion byproducts from the discharged cartridge be blown into the receiver as well. This accumulating carbon and vaporized metal build-up within the receiver and bolt-carrier negatively affects reliability and necessitates more intensive maintenance on the part of the individual soldier. The DI operation increases the amount of heat that is deposited in the receiver while firing the M16 and causes essential lubricant to be 'burned off'. This requires frequent and generous applications of appropriate lubricant. Lack of proper lubrication is the most common source of weapon stoppages or jams.
The original M16 fared poorly in the jungles of and was infamous for reliability problems in the harsh environment. As a result, it became the target of a Congressional investigation. The investigation found that:. The M16 was billed as self cleaning (when no weapon is or ever has been).
The M16 was issued to troops without cleaning kits or instruction on how to clean the rifle. The M16 and 5.56×45mm cartridge was tested and approved with the use of a DuPont IMR8208M stick powder, that was switched to Olin Mathieson WC846 ball powder which produced much more fouling, that quickly jammed the action of the M16 (unless the gun was cleaned well and often). The M16 lacked a (rendering the rifle inoperable when it jammed). The M16 lacked a chromed barrel and chamber, causing corrosion problems, contributing to case swelling and extraction failures (which was considered the most severe problem and required extreme measures to clear, such as inserting the cleaning-rod down the barrel and knocking the spent cartridge out). When these issues were addressed and corrected by the M16A1, the reliability problems decreased greatly.
According to a 1968 Department of Army report, the M16A1 rifle achieved widespread acceptance by U.S. Troops in Vietnam. 'Most men armed with the M16 in Vietnam rated this rifle's performance high, however, many men entertained some misgivings about the M16's reliability. When asked what weapon they preferred to carry in combat, 85 percent indicated that they wanted either the M16 or its submachine gun version, the. (The was preferred by 15 percent, while less than one percent wished to carry either the, the AK-47, the or a pistol.)' In March 1970, the 'President’s Blue Ribbon Defense Panel' concluded that the issuance of the M16 saved the lives of 20,000 U.S.
Servicemen during the Vietnam War, who would have otherwise died had the M14 remained in service. However the M16 rifle's reputation continues to suffer. After the introduction of the M4 Carbine, it was found that the shorter barrel length of 14.5 inches also has a negative effect on reliability, as the gas port is located closer to the chamber than the gas port of the standard length M16 rifle: 7.5 inches instead of the 13 inches.
This affects the M4’s timing and increases the amount of stress and heat on the critical components, thereby reducing reliability. In a 2002 assessment the USMC found that the M4 malfunctioned three times more often than the M16A4 (the M4 failed 186 times for 69,000 rounds fired, while the M16A4 failed 61 times). Thereafter, the Army and Colt worked to make modifications to the M4s and M16A4s in order to address the problems found.
Short-stroke gas piston In tests conducted in 2005 and 2006 the Army found that on average, the new M4s and M16s fired approximately 5,000 rounds between stoppages. In 2010, U.S. Marines operating in Afghanistan reported no reliability problems with their M16 rifles and M4 carbines. 'This is more so given the account of Chief Warrant Officer Joshua S.
Smith, the Marine responsible for weapons training and performance in the Third Battalion, Sixth Marines, which is engaged in daily fighting in Marja. 'We've had nil in the way of problems; we've had no issues,' he said of the M-4s and M-16s. The battalion has about 350 M-16s and 700 M-4s, he said.' The newest version of the M16 in U.S. Service is the (a.k.a. The ) which uses a proprietary gas system derived from the, replacing the gas system used by the standard M16/M4.
The HK system uses a driving an operating rod to force the bolt carrier to the rear. This design prevents combustion gases from entering the weapon's interior, a shortcoming with direct impingement systems. The reduction in heat and fouling of the bolt carrier group increases the reliability of the weapon and extends the interval between stoppages.
The short-stroke gas piston require less maintenance and cleaning. It reduces operator cleaning time and stress on critical components. 'Improving the service interval requirements provides a major benefit to soldiers that may not have the ability or opportunity to thoroughly clean their rifle. Also, the design of the external gas piston system is less susceptible to build up of other contaminants in extreme environments.' During factory tests the HK416 fired 10,000 rounds in full-auto without malfunctioning.
Magazines 'Magazines are one of the most important elements of any firearm design. They are responsible for the feeding portion of the cycle of operation.
Even in the most proven arm that reliably extracts and ejects, the magazine has to be 100-percent reliable for it to consistently feed properly.' The AK-47’s 30-round magazines have a pronounced curve that allows them to smoothly feed ammunition into the chamber. Their heavy steel construction combined with 'feed-lips' (the surfaces at the top of the magazine that control the angle at which the cartridge enters the chamber) machined from a single steel billet makes them highly resistant to damage. These magazines are so strong that 'Soldiers have been known to use their mags as hammers, and even bottle openers.' This makes the AK-47 magazine more reliable, although heavier than U.S.
And NATO magazines. The early slab-sided steel AK-47 magazines weigh 0.43 kg (0.95 lb) empty. The later steel AKM magazines had lighter sheet-metal bodies with prominent reinforcing ribs weighing 0.33 kg (0.73 lb) empty. The current issue steel-reinforced plastic magazines are even lighter, weighing 0.25 kg (0.55 lb) empty. Early steel AK-47 magazines are 9.75 inches long, and the later ribbed steel AKM and newer plastic magazines are about an inch shorter. The M16's magazine was meant to be a lightweight, disposable item.
As such, it is made of pressed/stamped aluminum and was not designed to be durable. Therefore, it is easier to damage than an AK-47 magazine and the feed lips are proportionally weaker when compared to the AK-47. The M16 originally used a 20-round magazine which was later replaced by a bent 30-round design. As a result, the magazine follower tends to rock or tilt, causing malfunctions. Many non-U.S. And commercial magazines have been developed to effectively mitigate these shortcomings (e.g., H&K's all-stainless-steel magazine, Magpul's polymer P-MAG, etc.). Standard USGI aluminum 30-round M16 magazines weigh 0.11 kg (0.24 lb) empty and are 7.1 inches long.
The newer plastic magazines are about a half inch longer. The newer steel magazines are about a half inch longer and 4 ounces heavier. The M16's magazine has become the unofficial and is currently used by many Western Nations, in numerous weapon systems.
In 2009, the U.S. Military began fielding an 'improved magazine' identified by a tan-colored follower. 'The new follower incorporates an extended rear leg and modified bullet protrusion for improved round stacking and orientation. The self-leveling/anti-tilt follower minimizes jamming while a wider spring coil profile creates even force distribution. The performance gains have not added weight or cost to the magazines.'
In July 2016, the U.S. Army introduced the new Enhanced Performance Magazine. These new magazines have tan bodies and blue followers. 'Unlike previous magazines, the EPM uses a new, modified magazine body (and therefore not interchangeable, hence the different color) which presents the rounds at a more favorable angle to the rifle’s feedway, improving reliability and, importantly, preventing the hardened steel tips of new 5.56mm M855A1 Enhanced Performance Rounds from contacting the aluminum feed ramp section on M4 type rifles.'
This allows for a dramatic 300% increase in the number of rounds fired between stoppages. Improved M16 magazine follower Service life AK-47 type rifles are made in dozens of countries, with 'quality ranging from finely engineered weapons to pieces of questionable workmanship.' As a result, the AK-47 has a service/system life of approximately 6,000, to 10,000, to 15,000 rounds.
The AK-47 was designed to be a cheap, simple, easy to manufacture assault rifle, perfectly matching Soviet military doctrine that treats equipment and weapons as disposable items. As units are often deployed without adequate logistical support and dependent on 'battlefield cannibalization' for resupply, it is actually more cost-effective to replace rather than repair weapons. Both the AK-47 and the M16 have small parts and springs that need to be replaced every few thousand rounds.
However 'Every time (an AK) is disassembled beyond the field stripping stage, it will take some time for some parts to regain their fit, some parts may tend to shake loose and fall out when firing the weapon. Some parts of the AK-47 line are riveted together. Repairing these can be quite a hassle, since the end of the rivet has to be ground off and a new one set after the part is replaced.' M16 type rifles are made by dozens of manufactures around the world, to the highest standards 'the goal of which is to ensure that products designed for military use meet the necessary requirements with regard to quality, durability, ruggedness, commonality, interchangeability, total cost of ownership, logistics and other military and defense-related objectives.' The M16's barrel life is approximately 15,000 rounds for standard issue M16A4s and M4s. Cold hammer forged steel barrels such as those used on the HK416 have service life of 20,000 to 50,000 rounds depending on the intensity of use.
A badly worn M16 barrel will cause the bullets to tumble in flight. However, the M16’s upper receiver/barrel may be swapped out in a matter of seconds, without the use of tools, simply by pushing out two pins. The M16 was designed to be a serviceable assault rifle, perfectly matching American military doctrine where units are resupplied on a continuous basis, and are expected to perform most of their own maintenance and repairs in the field. As such, American units are well supplied and are quickly provided with whatever spare-parts they need by their logistical support systems. An M16 rifle that has been declared non-serviceable may be sent to a Small Arms Repair Facility, where it is overhauled, upgraded and returned to service. The M16 rifle may be recycled almost infinitely, as any individual part can be easily replaced until none of the original parts remain.
Miscellaneous M16 AK-47 Technical. The 7.62×39mm and 5.45×39mm cartridges. The AK-74 is best described as a modified version of the rifle. These modifications were primarily the result of converting the rifle to the cartridge, some early models are reported to have been rebarreled AKMs. The AK-74 and AKM share 9 assemblies and 52 parts (36% & 53% parts commonality, respectively).
The 5.45×39mm cartridge is much lighter than the 7.62×39mm round that it replaced, allowing soldiers to carry 1.5 times more ammunition. The AK-74 also offers improved range and accuracy over the AKM. However, the AK-74s range and accuracy is still 'inferior to most Western weapons,' including current issue M16 type rifles.
The 5.45 mm bullet tumbles in soft tissue producing temporary cavities at a depth of 10 cm (3.9 in) and 35 cm (13.8 in). This effect is similar to, but more rapid than with 7.62×39mm cartridge.
The 5.45mm round offers better penetration over the U.S. However, unlike its counterpart, the 5.45mm round 'does not deform or fragment when striking soft tissues.' Nevertheless, during the the Mujahedeen called the 5.45×39mm round the 'Poison Bullet' due to the severe wounds it produced to extremities and the resulting need to amputate. Available firepower comparison Magazine Weight of loaded 30-round magazine Max. AK-74M with GP-34 grenade launcher and 60-round casket magazine Rifle evaluation study The following Summary has been taken directly from the 'Rifle Evaluation Study', United States Army, Combat Development Command, ADA046961, 20 Dec 1962.
Additional information can be found in 'Rifle Evaluation Study', United States Army, Infantry Combat Developments Agency, ADA050268, 10 Dec 1962'. Note: This is the first time that the United States Army compared the AR-15/M16 and the AK-47. From Rifle Evaluation Study, United States Army, Combat Development Command, ADA046961, 20 Dec 1962.