5.56mm, Heavy Barrel, Magpul Rear Sight, 1/9 twist
The Colt AR6721 Tactical Carbine offers a Magpul MBUS, 16.1" heavy barrel, and M4-style stock. This 5.56mm / .223 Colt AR-15 also sports a bayonet lug, double shielded hand guard, and a heavy barrel with a 1 in 9" twist.
|Length (stock retracted)||27.5"|
|Length (stock extended)||30.75"|
|Rate of Fire||Semi-auto|