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Conversion of M4s to the M4A1 in the Army began in 2011, as part of the Product Improvement Program, which included the conversion of 300,000 M4 carbines to the M4A1. [38] The 101st Airborne Division began fielding newly built M4A1s in 2012, and the U.S. 1st Infantry Division became the first unit to convert their M4s to M4A1-standard in May 2014.
The Individual Carbine was a competition to select the planned successor to the M4 carbine in the United States Army. The U.S. Army conducted an open competition for a carbine to replace the M4. This competition was for the Army only—the United States Marine Corps and other branches chose to stay with current weapons in service.
Colt SMG: 4th Generation M4, Rail/RIS S-1-F Flattop No Yes 9mm NATO 10.5 in. A1 1:10 No A1 Birdcage 992: Colt SMG: 4th Generation M4, Rail/RIS S-1-3 Flattop No Yes 9mm NATO 10.5 in. A1 1:10 No A1 Birdcage Colt model no. Name Stock Hand guards Fire control Rear sight Forward assist Case deflector Caliber Barrel length Barrel profile Barrel twist
The most successful and famous of these are numerous M16 carbines, including the Colt Commando family, and the M4 carbine. In 2002, Colt Defense was split off from Colt's Manufacturing Company. Colt's Manufacturing Company served the civilian market, while Colt Defense served the law enforcement, military, and private security markets worldwide.
The Special Operations Peculiar MODification (SOPMOD) kit is an accessory system for the M4A1 carbine, CQBR, FN SCAR Mk 16/17, HK416 and other weapons used by United States Special Operations Command (USSOCOM) special forces units, though it is not specific to SOCOM.
The Heckler & Koch HK416 is an assault rifle chambered for the 5.56×45mm NATO cartridge.It is designed and manufactured by the German company Heckler & Koch.. Although the design is based on the AR-15 class of firearm (specifically the Colt M4 carbine family issued to the U.S. military), it uses a proprietary short-stroke gas piston system from Heckler & Koch's earlier G36 family of rifles.
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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 ...