Unlike the current Colt M4 Carbine which features a 4-position telescopic stock, the Bushmaster has a 6-position stock.
223 Remington/5.56×45mm NATO, and the barrel is hard chrome lined in both the bore and chamber.
It can be ordered by military or law enforcement organizations with three-round burst or fully automatic capability. civilian market in compliance with the National Firearms Act. It is only sold as a semi-automatic for the U.S. The M4 Type Carbine is a variant of the Colt M4 carbine. It is one of the Bushmaster XM15 line of rifles and carbines. The Bushmaster M4 is a semi-automatic carbine manufactured by Bushmaster Firearms International, modeled on the AR-15 platform. (700–950 round/min for fully automatic model) Carbine rifle (semi-automatic or select fire)
