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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.
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.
Carbon 15 rifles are generally chambered in 5.56×45mm NATO/.223 Remington, [4] although Bushmaster also produced 9×19mm Parabellum versions of the pistol and carbine. [ citation needed ] In early 2009, Bushmaster began to include the dust cover and forward assist in their Carbon 15 M4-style rifles.
Bushmaster's firearms, such as the XM-15 line, were offered in a 5.56 NATO chambering with forged aircraft-grade (7075-T6) aluminum receivers. Most Bushmaster barrels were 4150 steel, offered in 1:9 twist rate, and chrome-lined to increase durability. Some barrels were available with 1:7 rifling on special order.
Bushmaster M4 Type Carbine: Bushmaster Firearms International.223 Remington 5.56x45mm 6.8mm Remington SPC 7.62×39mm United States: 1990s C42: W+F Bern: 6.45×48mm XPL Swiss Switzerland: no 1978 CAR-15: Colt's Manufacturing Company: 5.56×45mm.223 Remington United States: yes 1966-present CAR 816: Caracal International: 5.56×45mm United Arab ...
The M4's 14.5-in. barrel length reduces muzzle velocity to about 2900 ft/s. [151] This reduced wounding ability is one reason that, despite the Army's transition to short-barrel M4s, the Marine Corps has decided to continue using the M16A4 with its 20-inch barrel as the 5.56×45mm M855 is largely dependent upon high velocity in order to wound ...
The Adaptive Combat Rifle (ACR) is a modular assault rifle formerly designed by Magpul Industries of Austin, Texas, and known initially as the Masada.. In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul whereby Bushmaster would take over production, future development, and sales of the Masada. [5]
The Bushmaster M17S is a semi-automatic rifle that uses a gas-operated, rotating bolt. The design takes the operating system of the Armalite AR-18 and moves the pistol grip forward in a manner similar to the British SA80 .