The Radical Firearms 20" Big Bore profile 450 Bushmaster is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced shooter wanting to finish out that build and hit the range. Built with our 15" MHR free float rail system for increased accuracy and keeping your hands cool. No matter what your style of shooting is, Radical Firearms has you covered.
Barrel Length: 20"
Gas System: Mid Length
Barrel Profile: Big Bore Profile
Barrel Material: 4140 Chrome Moly Vanadium
Barrel Finish: Melonite
Muzzle Thread: 5/8x32
Chamber: 450 Bushmaster
Twist Rate: 1:14
Barrel Extension: Single Feed Ramp
Gas Block Type: .936 Low-profile Gas Block
Muzzle Device: Panzer Brake
Upper Receiver Material: Forged 7075 T6
Upper Receiver Style: M4 Mil-Std with Oversized Ejection Port
Upper Receiver Finish: Type III Anodizing
Forward Assist: Yes
Dust Cover: Yes
Handguard Type: Free Float
Handguard Style: M-Lok Hybrid Rail
Handguard Length: 15"
Charging Handle: Mil-Std
Bolt Carrier Group Included: Yes
BCG Finish: Nitride
Magazine: 450 7 Round
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