One of the strangest events in the history of the M107 fight was told by Barrett`s gun engineer, Don Cook, in a 2011 interview with National Geographic. A retired Marine with two decades of experience working with the M82 rifle series in Barrett, Cook once received a call from a Marine sniper caught in the middle of a shootout whose M107 wasn`t working properly; The young Marine thought quickly and called on him for “technical support”. Cook quickly discovered the problem, and with his advice, the sniper was able to correct the malfunction and return to combat. The manufacturer claims that the M107 has a MOA accuracy of 1 with match-grade ammunition, but as mentioned by Mel Ewing on the Sniper Central page for the M82A1, this claim is somewhat misleading; Match-grade ammunition was not available for military use at the time Barrett made this claim, and the M107`s numerous, large, heavy moving parts are also a significant obstacle to accuracy. Even without oscillation, an accuracy of 1 MOA would be virtually impossible to achieve without match-grade projectiles, and almost all .50 BMG ammunition used by the U.S. Military is machine gun grade. However, it should be noted that the M107 is quite capable of systematically hitting a human-sized target, with the first shot fired at 1,000 m (and in some cases almost daily) and even reaching up to 2,000 m. During the recent wars in Iraq and Afghanistan, two long-range snipers were perpetrated by American snipers at distances of more than 2,000 meters with their Barrett M82 series rifles. The origins of the anti-materiel rifle date back to the First World War, in which the first anti-tank rifles appeared. While modern tanks and most other armored vehicles are too well protected to be affected by anti-materiel rifles, weapons are still effective at attacking unarmored or lightly armored vehicles. They can also be used against stationary enemy aircraft, rocket launchers, radar equipment, small ships, communications equipment, weapons operated by the crew and similar targets.
Their value lies in their ability to accurately target and disable enemy assets at great distances at a relatively low cost. Such an exchange of fire with an M107, which indicates the robustness of the weapon, is recounted in the article by Michael Golembesky DE SOFREP News MARSOC Sniper and Barrett M107 in Afghanistan of March 6, 2012. A 14-member Marine Special Operations Team (MSOT) operating in the Bala Morghab River Valley was tasked with capturing a strategic hill in that area called the Objective Pathfinder, and their snipers soon realized that the areas involved required the use of an M107 (they also had 7.62mm rifles). Their rifle was damaged by enemy fire in the ensuing shooting, and a magazine was destroyed by a tracer grenade from a Taliban machine gun (enemy ammunition actually boiled a .50 BMG cartridge, but the magazine was strong enough to contain most of the explosion), but they were able to quickly handle the weapon with little effort and bring it back into battle. Use only a basic set of tools. The battle lasted four days, but the snipers had no additional problems with the M107 and were able to devastate the enemy at long range and stifle their supply and reinforcement efforts, and the MSOT gained a hill. The same M107 was also used regularly in combat for several months before undergoing overhaul despite a gaping bullet hole in the well—-. Anti-materiel rifles can also be used in non-offensive roles – for example, for the safe destruction of unexploded ordnance. Barrett M82A3: This is a U.S. Marine Corps designation for the Barrett M82A1M.
It is also officially called the special application scope rifle. This weapon is almost identical to the U.S. Army M107 The U.S. Marine Corps has received a significant number of Barrett M82A3 rifles. This weapon was used during Operations Desert Shield, Desert Storm and the war in Afghanistan. In 2004, U.S. Marine Corps sniper Steve Reichert killed his M82A3 rifle in Iraq from a height of 1,614 meters. United States: The Federal Bureau of Investigation purchased two 20mm rifles from Anzio in 2009.
  Accuracy International AS50: Developed in the UK, the AS50 is another self-loading .50 BMG anti-materiel rifle designed for military use. Unlike the M107, it is powered by gas and uses a pistonless gas hose with direct impact, similar to the AR-10 or M16. The AS50 was developed as a weapon specifically designed for use by U.S. Navy SEALs, but the U.S. Navy ultimately never adopted it. Another useful application of 20 mm anti-material rifles is the neutralization of explosive ordnance, since they allow not only a significant distance, but also a much greater probability of detonating a particular munition than with small arms fire. This is a particularly attractive proposal for eliminating unknown ammunition or defeating improvised explosive devices. Arash: This new Iranian 20mm anti-materiel rifle was first unveiled to the public in 2013. It has an unusual design with a bullpup layout that places the magazine, receiver and action far behind the user who puts the gun on his shoulder.
The Arash has an extremely long bipod, so it can be pulled relatively stable from a stop. The firepower of .50 BMG ammunition is superfluous compared to most other small arms projectiles, as it is capable of penetrating thin steel armor plates even with a “bullet” projectile (although only at relatively short distances with this type of cartridge), and the injuries it inflicts on a human target can be enormous; And while the effective range is up to 1,800 m, the projectile is lethal up to a distance of several times. With special ammunition such as API projectiles, the damage caused can easily be much greater. It is typically used in the M107 to attack “soft” targets at long range, which would have traditionally required rocket launchers, recoilless rifles, anti-tank missiles, mortars or even artillery to attack from a distance; These include lightly armoured vehicles, pill boxes, fuel silos, parked aircraft, radar antennas and trucks. Although .50 BMG ammunition is much more expensive than most other small arms ammunition, it is much lower than the ammunition for heavy weapons mentioned above. These make the M107 ideal for raids, special operations, harassment of enemy forces, and prohibition missions. The M107`s overall range and accuracy are also sufficient for counter-sniper operations, where enemy snipers armed with more conventional rifles don`t have the range to fight back or can`t compete with the M107`s ability to shoot through the cover (like brick walls or sandbags). The offensive use of anti-materiel rifles or special application range rifles (SASR) is called by the U.S. Army Hard Target Prohibition (HTI).  Similar to how the Marines hastily introduced the M82A1 in 1990, the U.S. Army quickly classified the XM107 as “M107” in 2002 and began shipping later that year.
This was likely due to the army`s sudden engagements in Afghanistan, especially since the Taliban and al-Qaeda were known to possess about 50 M82A1s (which had been handed over to the mujahideen resistance by the CIA in the 1980s). Although, despite the urgency of the situation, the M107 was not approved for full field use until 2005. At that time, a total of 1,998 rifles had been delivered to the Army, at a cumulative acquisition cost of $29.2 million (resulting in a median unit price of $14,614). The M107 was produced from 2002 to 2010 and replaced in production by the upgraded M107A1. It is likely that the M107A1 will also replace the M82A1 in production and development. The Barrett M82 and its variants are currently in service in Germany, India, the United States and possibly other countries, — without other M82 rifles used by nearly 60 countries. In general, anti-material rifles for cartridges of 12.7×99 mm NATO (.50 BMG), 12.7×108 mm Russian, 14.5×114 mm and 20 mm are chambered. Large cartridges are needed to fire projectiles containing usable payloads such as explosives, armor-piercing cores, incendiary devices or combinations thereof, such as those found in the Raufoss Mk 211 projectile. Certain special precautions should be taken when using the M107. Hearing protection should always work when firing the weapon, as it is much stronger than standard rifles.