The most common .50 caliber sniper rifle is the Barrett produced M82A1. Designed in 1980, the semi-automatic rifle is equipped to numerous national armed forces. The U.S. military uses the weapon under the operational title M107.
The .50 caliber Browning Machine Gun round is among the largest rifle-fired cartridges in use. It has a bullet diameter of roughly half an inch and a length of nearly four inches. The M82A1 is capable of accurately firing this round over a mile. It's primarily used to destroy enemy installations, vehicles and equipment. It has a secondary role as an anti-personnel weapon but usually only against targets behind cover.