How do M4 Riffle Factory Look Like?

In 1984, U.S firearms producers Colt began working on a new carbine design based on the M16A2 assault rifle at the behest of the U.S military. Its design has its roots in Colt’s earlier CAR-15 series of weapons dating back to the 1960s, most notably the Colt Commando variants. Designated as the XM4, the weapon has 80% of part commonality with the M16A2 and like its parent design, fires a three-round burst. It also features a 14.5-inch barrel, allowing the attachment of a bayonet and M203 grenade launcher as well as improving the weapon’s ballistics and reduces muzzle flash. In 1994, the U.S. military officially accepted the M4 into service, with the weapon first seeing its first operational conflict in Kosovo in 1999. It has seen major usage in the ‘War On Terror’, including combat in Iraq and Afghanistan.

The M4 largely replaced the M16A2 in frontline service by U.S troops, although the M16A4 was adopted as the standard-issue rifle of the U.S. Marine Corps. However, M4s were issued to troops in positions where the full-length M16 was too bulky for such operations, such as vehicle operators.^[1] The M4 also largely replaced submachine guns and selected sidearms in service, as it provided more stopping power and penetration than either aforementioned weapons. In December 2017, the Marine Corps revealed a decision to equip every Marine in an infantry squad with the M27, ultimately replacing the M4 in that part of the service.