Bravo Company Manufacturing BCM-CARBINE-862-750Direct Gas Impingement Semi Auto Rifle5.56 NATO (Accepts .223 Remington)18" 410 Stainless Steel Medium Contour Barrel1:8" Twist RateM4 Feed Ramp ExtensionUSGI Chrome Lined Bore/ChamberHPT/MPI Inspected Barrel as per the Mil-SpecForged 7075-T6 Aluminum Upper/Lower Receiver (Hard Coat Anodized Finish)Flat Top Upper with M4 Feed RampRifle Length Gas SystemLow Shelf RDIASLow Shelf for AccuwedgeSafe/Semi Marked Fire ControlStaked M4 Lock NutUSGI H BufferMil-Spec Carpenter No 158 Steel Bolt (HPT/MPI)Shot Peened CarrierTool Steel Extractor with BCM Extractor SpringChrome Lined Carrier (Full Auto Profile)Chrome Lined Gas KeyStaked Grade 8 FastenersBCM Gunfighter MCMR Free Float Hand GuardBCM Gunfighter Charging HandleBCM CompensatorBCM ButtstockBCM Pistol GripBCM QD End PlateBCM PNT TriggerBCM Trigger Guard30 Round MagazineAccepts Standard Pattern Ar-15 MagazinesApproximate Weight 7lbsCollapsed Length 34"Extended length 37"Black Finish