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The Colt ACC-M (Advanced Colt Carbine-Monolithic) adds Colt's proprietary, monolithic Mil-Std-1913 rail system (quad rail) forward hand guard to the normal M4 carbine upper receiver. Colt M4 Carbines and Colt M4A1 Carbines can be easily and relatively inexpensively modified/upgraded into ACC-Ms by replacing the upper receiver, which is more ...
In 2012, S&T Motiv introduced the K2C, or K2 Carbine. It has a shortened 310 mm (12 in) barrel with adjusted gas piston, upper receiver/handguard Picatinny rail, and right side-folding M4-style retractable stock; [9] it weighs 3.3 kg (7.3 lb), is 880 mm (35 in) long with stock extended and 630 mm (25 in) with stock folded. [5]
Magpul created a larger variation of their PMAG magazine, called the "Black Widow," with a blood-red follower for the 6.8mm round. The upper and lower receivers were developed specifically to fit this Magpul magazine and optimized around the 6.8×43mm round. The flagship model of the Six8 series is the UCIW which features an 8.5-inch barrel.
The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 January 2025. Series of assault and battle rifles IWI Galil ACE Galil ACE 22 Type Assault rifle Battle rifle Place of origin Israel Service history In service 2008–present Used by See Users Wars Colombian conflict Mexican Drug War Production history Designer Israel Military Industries Manufacturer ...
The flattop upper receiver with the Picatinny rail was introduced with the M4A1 variant in 1994, and all subsequent orders for all M4 variants would have a flattop upper receiver. Variants of the carbine built by different manufacturers are also in service with many other foreign special forces units, such as the Australian Special Air Service ...
The Colt Advanced Piston Carbine or Colt APC (internal product number P0923) is a lightweight modular 5.56mm caliber piston-operated, magazine fed carbine with a one-piece upper receiver which is capable of firing in automatic and semi-automatic modes.
The selector lever is located on the left side of the receiver and has 4 settings: "S" - weapon safe, "1" - single fire mode, "3" - 3-round burst, "A" - continuous (automatic) fire. The FNC's barrel features a flash suppressor that is also used to launch NATO standard 22mm rifle grenades (only the standard rifle model has this capability). The ...