its crew from the enemy until the main anti-tank gun was ready for firing; however, Parks concludes that some U.S. troops assumed the existence of a legal limitation on the use of .50-caliber projectiles more generally. Partial list of .50 BMG firearms Carbines Barrett M82CQ (a carbine version of the M82A3) Bushmaster BA50 carbine (22" barrel version of the BA50) Serbu Firearms BFG-50 Carbine (22" barrel version of the BFG-50 single-shot bolt-action) Rifles Accuracy International AS50 Accuracy International AW50 Accuracy International AX50 ArmaLite AR-50 Arms Tech Ltd. TTR-50 Barrett M82/M107 Barrett M95 Barrett M99 Bushmaster BA50 Cadex Defence CDX-50 Tremor Desert Tech HTI DSR-50 Gepárd anti-materiel rifle McMillan TAC-50 OM 50 Nemesis PGM Hécate II Pindad SPR-2 Ramo M600 Robar RC-50 Serbu Firearms BFG-50 (single-shot bolt-action) Serbu Firearms BFG-50a (magazine fed semi-automatic) Serbu Firearms RN-50 (single-shot modified break-action) Snipex M Snipex Rhino Hunter Steyr HS .50 WKW Wilk Zastava M93 Black Arrow Machine guns GAU-19 M1921 Browning machine gun M2 Browning machine gun M85 machine gun Rolls-Royce Experimental Machine Gun - only built as prototype STK 50MG XM218 XM312 XM806 (LW50) Kord machine gun - export variant Pistols Triple Action Thunder Chain gun Profense PF 50 See also .50 Caliber BMG Regulation Act of 2004 .50 caliber handguns .510 DTC EUROP .510 Whisper 12 mm caliber 12.7×108mm (Russian equivalent) 14.5×114mm Gun laws in the United States (by state) List of firearms List of rifle cartridges NATO EPVAT testing Table of handgun and rifle cartridges References 50 BMG 50 BMG 12.7×99mm NATO cartridges Weapons and ammunition introduced in 1921 Winchester Repeating Arms Company cartridges