M4 A1 Carbine

The M4A1 Carbine is a shortened version of the M16A2 assault rifle manufactured by Colt. The M4A1 is a favorite amongst US Special Operations Forces. The M4A1 variant comes with a safe / semi-auto / automatic trigger groups as apposed to the safe / semi-auto / 3-round burst configuration found on standard M4s.

A version with a 10' barrel, known as the CQBR, is also in use with Naval Special Warfare Units such as the SEALs.

M4A1 Specifications

M4A1 - Images and Further Info

A M4A1 carbine fitted with Rail Interface System (RIS), flip-up rear sight and Trijicon ACOG 4x

US DoD photo

The Special Operations Peculiar Modification (SOPMOD (Block I)) kit was developed by United States Special Operations Command (SOCOM) and consists of a number of components, allowing the M4A1 to be highly customizable depending on specific mission requirements. (click image for larger version)

US DoD photo

A US Special Forces soldier armed with a M4A1 Carbine, fitted with an underslung M203 40mm grenade launcher, aimed with a M68 Close Combat Optic red dot sight. This M4A1 also has a AN-PEQ2 and a torch fitted to the Rail Interface System (RIS).

US DoD photo

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