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Short-barreled rifle (SBR) is a legal designation in the United States, referring to a shoulder-fired, rifled firearm, made from a rifle, with a barrel length of less than 16 in (41 cm) or overall length of less than 26 in (66 cm), or a handgun fitted with a buttstock and a barrel of less than 16 inches length.
The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of assault rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.
Conversely, many rifles have barrels shorter than 20 inches, yet are not considered carbines. The AK series rifles has an almost universal barrel length of 16.3 inches (410 mm), well within carbine territory, yet has always been considered a rifle, perhaps because it was designed as such and not shortened from a longer weapon.
However, these rifles had design issues, as the barrel length was halved to 10 inches (25 cm), which upset the ballistics, reducing its range and accuracy and leading to considerable muzzle flash and blast, [14] meaning that a large flash suppressor had to be fitted. [15] In 1982, the U.S. Government requested Colt to make a carbine version of ...
Because the U.S. 1934 NFA regulations set the minimum rifle barrel length at 16 inches (410 mm), Charter Arms made the barrels of the Explorer I rifle and Explorer II pistol non-interchangeable to prevent installing the pistol barrel on the rifle. The AR-7 barrel has an alignment lug that mates a notch in the receiver.
The standard barrel has rifling of 1 turn in 9". [3] E2S Series: The basic E2S is fitted with a 16-inch carbine-style barrel. E2S Target [6] - 20" heavy-barrel target rifle with A2-style stock and carry handle upper, also available with 24" and 26" barrels. E2S Shorty [7] - 16-inch version with a "shorty" handguard. [6]
Barrett Firearms Manufacturing was founded by Ronnie Barrett for the sole purpose of building semi-automatic rifles chambered for the powerful 12.7×99mm NATO (.50 BMG) ammunition, originally developed for and used in M2 Browning machine guns.
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). 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 ...