Colt Sporter M4 Carbine 5.56mm SP6940 with quad-rail upper, new in box.
Rifle features the one-piece monolithic rail upper with MaTech BUIS (back-up iron sight). The Mil-Spec M1913 rail is continuous from the rear of the receiver to the folding front sight, allowing for a multitude of optic, laser and light mounting combinations. The 16″ barrel is chrome lined and comes with a bayonet lug. The lower is stamped “COLT SPORTER M4 CARBINE” and features an M4 4-position waffle stock.
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