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The Bushmaster XM-15 series (or XM15 [3]) is a line of AR-15 style semi-automatic rifles and carbines manufactured by Bushmaster Firearms International, LLC. [2] Variants include the Bushmaster M4-type Carbine , Patrolman series, QRC series, Bushmaster XM15-E2S, and the Carbon 15 line.
Bushmaster Firearms originally produced their 'First Generation' rifle using an aluminum lower receiver and a stamped steel upper receiver. This first-generation model used a long-stroke gas piston operating system. The recoil spring was within the upper barrel gas system compared to the AR-15/M-16, where the recoil spring is within the butt stock.
Initial sales of the Colt AR-15 were slow, primarily due to its fixed sights and carry handle that made scopes difficult to mount and awkward to use. [84] Military development of compact military AR-15 carbines encouraged production of a 16-inch (41 cm) barreled civilian SP1 carbine with a collapsible buttstock beginning in 1977.
The Bushmaster M4 [2] or M4A3 [3] is a semi-automatic or select-fire carbine size assault rifle manufactured by Bushmaster Firearms International, modeled on the AR-15. It is one of the Bushmaster XM15 line of rifles and carbines.
Any AR-15/AR-10 cartridge cases that are derived from the 7.62x51 can also be formed from these listed calibers. (7.62x51 & .308 are similar in external dimensions though the Brass has different internal capacity and Max PSI recommendations are different & Chambers are different.) AR-10: The AR-10 is slightly larger and heavier than the AR-15.
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Bushmaster Arm Pistol, a 5.56×45mm NATO weapon classified as either a long pistol or short rifle; Bushmaster M17S, a semi-automatic bullpup rifle; Bushmaster ACR, an assault rifle originally designed by Magpul; Bushmaster XM-15, a line of AR-15 pattern rifles and carbines; Bushmaster M4-type Carbine, a carbine in the XM-15 family
The M110's use of KAC's one-piece 30 mm scope mount instead of two separate scope rings. On June 12, 2008, the M110 was ranked #2 on the U.S. Army's top ten inventions of 2007. [ 5 ] According to performance specification (MIL-PRF-32316 (AR) w/AMENDMENT 1, 5 October 2009):