F1 Firearms AR-15 Pistol 5.56 Shockwave Marauder with 7″ Nitride Barrel, Black

Product Details Details Barrel Length:  7″ Gas System:  Pistol-length Barrel Profile:  Heavy Barrel Steel:  4150V Chrome Moly Steel Barrel Finish:  Nitride Chrome Lining:  None Muzzle Thread:  1/2-28 Chamber:  5.56 NATO Twist Rate:  1 in 7″ Barrel Extension:  M4 Diameter at Gas Block:  .750″ Gas Block Type:  Low-profile Muzzle Device:  PSA Patent Pending Muzzle Device Receiver Material:  Forged 7075 T6 Receiver Type:  M4 Handguard Type:  Magpul “MOE” Carbine Length M-Lok Handguard Bolt Carrier Group Included:  Yes Bolt Steel:  Carpenter 158 Bolt Carrier Profile:  Full-auto Charging Handle Included:  Yes Lower Receiver:  Forged 7075 T6 Aluminum Receiver Finish:  Hardcoat Anodized Fire Control Group:  Single-Stage, Mil-spec style Grip:  Magpul Grip, Black Buffer Tube:  7075 T6 Aluminum Adjustment:  Fixed Pistol Brace:  KAK Industries Shockwave Brace, Black Magazine:  30 Round Pmag