According to Schiffer Military’s book The M1 Carbine: Markings, Variants, Ammunition, Accessories, the criteria for this new weapon were to weigh less than 5 pounds, be able to be carried on a ...

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for most ...

The front sight flips down for unobstructed use of optics and accessories. The rifle uses a 'tappet' type of closed gas system much like the M1 Carbine while the bolt carrier otherwise resembles ...