Colt Firearms M4 SBR Black 5.56 14.5-inch 30rd NFA item

caliber: 5.56x45 NATO (.223 Rem.) weight: 6.6 lbs (2.99 kg) overall length (stock retracted): 30.5 in. (77.5 cm) overall length (stock extended): 33.75 in. (85.7 cm) barrel length: 14.5 in. (36.83 cm) rate of fire: SEMI rifling: 1/7 RH effective range: 600 m a Mil-Spec hammer and trigger pivot pins a Magpul back up sight and Mil-Spec folding front sight for enhanced optical solutions a modularity for under mounting accessories a patented one-piece monolithic upper receiver incorporates a continuous Mil-Spec rail from the rear of the upper receiver to the front sight a true free-floating barrel provides the enhanced accuracy necessary for long-range acquisition capability