The Radical Firearms M4 Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Upper Receiver, Forward Assist, Ejection Port Door, Barrel Nut. 10.5" M4 Profile Barrel and A2 Flash Hider. Bolt Carrier Group and Charging Handle are additional and are offered at discounted prices in the drop down menus.Barrel Length: 10.5"
Barrel Material: 4140 Chromoly Barrel
Barrel Finish: Melonite Coating
Barrel Profile: HBAR
Barrel Thread Pitch: 1/2x28
Twist Rate: 1:7
Barrel Extension: M4 Feed Ramps
Gas System: Carbine Length
Gas Block Type: .750 Low Profile Gas Block
Muzzle Device: A2 Flash Hider
Upper Receiver Material: Forged 7075 T6
Upper Receiver Style: M4 Mil-STD
Upper Receiver Finish: Type III Anodizing
Forward Assist: Billet Dimpled
Dust Cover: MIL-STD
Handguard Type: Free Float
Handguard Style: Keymod Hybrid Rail
Handguard Length: 9"
Made in Houston, Texas U.S.A.!