M107 Barrett 50 Cal Refererence Model

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The Barrett M82 (standardized by the U.S. military as the M107) is a recoil-operated, semi-automatic anti-materiel rifle developed by Barrett Firearms Manufacturing and produced in the United States.

Also called the Light Fifty (due to its chambering of the .50 BMG 12.7×99mm NATO cartridge),[2][3] the weapon is classified in three variants: the original M82A1 (and M82A3) models, the bullpup M82A2 model, and the Barrett M107A1, with an attached muzzle brake (designed to accept a suppressor, and made out of titanium instead of steel). The M82A2 is no longer manufactured, though the XM500 can be seen as its successor.

Despite being designated as an anti-materiel rifle, the M82 can also be deployed as an anti-personnel system.