M4 Sbr 5.56Mm 14.5" Blk 30+1 *

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 - Mil-Spec hammer and trigger pivot pins - Magpul back up sight and Mil-Spec folding front sight for enhanced optical solutions - modularity for under mounting accessories - patented one-piece monolithic upper receiver incorporates a continuous Mil-Spec rail from the rear of the upper receiver to the front sight - true free-floating barrel provides the enhanced accuracy necessary for long-range acquisition capability