What does AMR mean in Military?

Anti-materiel rifle

An anti-materiel rifle (AMR) is a rifle designed for use against military equipment, structures, and other hardware (materiel). Anti-materiel rifles are chambered in significantly larger calibers than conventional rifles and are employed to eliminate equipment such as engines and unarmored or lightly armored targets. While modern armored vehicles are resistant to anti-materiel rifles, the extended range and penetration still has many modern applications. While not intended for use against human targets, the bullet weight and velocity of anti-materiel rifles gives them exceptional long-range capability even when compared with designated sniper rifles. Anti-materiel rifles are made in both bolt-action as well as semi-automatic designs. The anti-materiel rifle originated in the anti-tank rifles, which itself originated during World War I. While modern tanks and most other armored vehicles are too well protected to be affected by anti-materiel rifles, the guns are still effective for attacking unarmored or lightly armored vehicles. They can also be used against stationary enemy aircraft, missile launchers, radar equipment, small watercraft, communications equipment, crew served weapons and similar targets. Their value lies in their ability to precisely target and disable enemy assets from long range at relatively low cost. Despite having been designed to be used against equipment, anti-materiel rifles have also been used for killing soldiers from distances that are beyond the effective range of rifle-caliber cartridges. Anti-materiel rifles can also penetrate most obstacles and building materials, making them viable for engaging targets behind cover that is usually hard enough to stop rifle-caliber cartridges. The offensive use of anti-materiel rifles or special application scoped rifles (SASR) is termed hard target interdiction (HTI) by the United States military.Anti-materiel rifles can also be used in non-offensive roles – for example, for safely destroying unexploded ordnance.

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