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M4: Government barrel profile with small portion reduced to 0.575 inches to mount M203 grenade launcher; M4 HBAR: M4 barrel with portion under handguard thickened for sustained automatic fire; Super Heavy: Special Colt bull target/match barrel; SFW: Special Forces Weapon profile, A2 profile with "fat" portion forward of the sight triangle
The Colt Officer's Model or Colt Officer's ACP is a single-action, semi-automatic, magazine-fed, and recoil-operated handgun based on the John M. Browning designed M1911. It was introduced in 1985 as a response from Colt to numerous aftermarket companies making smaller versions of the M1911 pistol.
Models in use included the M1911A1 (Colt .45 Automatic), Smith & Wesson (Combat Masterpiece in .38 Special caliber), Smith and Wesson Model 1917 (.45 ACP and .45 Auto Rim) and various other small arms. By the 1970s it became obvious that the M1911A1 (Colt Government .45ACP) model was going to have to be replaced. [4]
The M4 was developed and produced for the United States government by Colt, which had an exclusive contract to produce the M4 family of weapons until 2009. [6] Several other manufacturers, including Bushmaster, offer M4-like firearms, nicknamed "M4geries." Colt previously held a U.S. trademark on the term "M4." [7]
M4 Carbine. Colt was the original producer of the M16 rifle, rights to which it purchased from designer ArmaLite, and today offers a complete "Family of Weapons" based around the derivative M4 Carbine, which includes a heavy barreled rifle (HBAR), a carbine with sliding stock (M4 & ACC-M), a personal defense weapon with folding-collapsible buttstock (SCW), a piston carbine (APC), a Commando M4 ...
The Colt Model 933 is a compact carbine based on the AR-15, M16 rifle and M4 Carbine produced by Colt starting in 1995. Due to its compact size, the short-barreled Colt 933 continues to be used by various US Special Forces and by some foreign forces, including Israeli Special Forces.
Colt Canada introduced the MRR, or Modular Rail Rifle, in 2015 and released it for sale to the market in 2016. It is essentially a monolithic upper receiver with Magpul's M-LOK attachment system for accessories. The rifles are offered with 11.6, 14.5, 15.7 and 18.6 in (290, 370, 400 and 470 mm) barrels.
A M231 FPW, with wire stock (Top-right of the image) The M231 is different in many ways from a standard M16. The original Rock Island Arsenal FPW fired from an open bolt, with an extremely high rate of firing (1,200 rpm). The Colt XM231 introduced a special buffer and spring assembly, with three springs nested one within the other.