There is also a military M4 Type Carbine which comes with a 14.5 in (370 mm) barrel and a removable "bird cage" flash suppressor. federal law which states a minimum 16 in (410 mm) barrel for a rifle. Bushmaster also produces the Patrolman's Carbine variant which features the more common removable "bird cage" flash suppressor, attached to a 16 in (410 mm) barrel bringing the total barrel length to 17.5 in (440 mm). The standard M4 Type Carbine features a permanently fixed "Izzy" flash suppressor attached to a 14.5 in (370 mm) barrel which brings the barrel to a total length of 16 in (410 mm). It is compatible with most standard AR-15 parts, and has the ability to accept all AR-15/M16 type STANAG magazines.Īll variants of the rifle are available in either M4A2 and M4A3 configurations the difference being the M4A3 has a removable carry handle allowing access to a Picatinny rail for mounting accessories. 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)