Colt M4 Carbine 5.56mm NATO 16.1in Matte Black Semi Automatic Modern Sporting Rifle - 30+1 Rounds - Throughout the world today Colt's reliability, performance and accuracy provide our armed Forces with the confidence required to accomplish any mission, and this rifle can do the same for you. Colt's 6920 series shares many of the same features as it's combat-proven brother the Colt M4. From the forged aluminum upper and lower receivers, to the chrome lined barrel, even through the gas operated semi automatic firing system. Don't settle for imitations, buy the real thing, buy a Colt. The civilian model 6920 is the civilian version of the current Colt M4 Carbine used by our modern military war fighters.