Also lovingly referred to as a "Ma Deuce" from its designation M-2. Originally designed for indirect fire (see Artillery), when employed for direct fire, the "fifty" is efective against ground troops and more hardened objectives. Gunnery Sergeant Carlos Hathcock effectively used an M-2 for several of his 93 confirmed kills in Vietnam. One shot was 2500 yards, the longest confirmed sniper shot in Vietnam or any other war.

The "Ma Deuce" remains a major armament for many Armed Forces worldwide. ATF-Approved, semi-auto versions are available. Night vision is optional. Surplus linked belt ammo can be had for about $1.50 a round.