The Radical Firearms 20" HBAR Contour 450 Bushmaster AR rifle uses MIL-STD Upper and lower receivers along with our 15" MHR free float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. Regardless if it’s your first or fiftieth, a Radical Firearms AR rifle will not disappoint!

SKU: FR20-450BUSH-15MHR
UPC: 816903027330
MFR#: RF00084

• Barrel Length: 20"
• Barrel Material: 4140 Chrome-Moly Vanadium Steel
• Barrel Finish: Melonite
• Barrel Profile: HBAR Contour
• Barrel Thread Pitch: 5/8x32
• Chamber: 450 Bushmaster
• Twist Rate: 1:20
• Barrel Extension: Single Ramp
• Gas System: Rifle Length
• 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 Over-sized ejection port
• Upper Receiver Finish: Type III Anodizing
• Forward Assist: Yes
• Dust Cover: Yes
• Handguard Type: Free Float
• Handguard Style:M-Lok Thin Rail
• Handguard Length: 15"
• Charging Handle: MIL-STD
• Lower Receiver: Forged 7075 T6
• Lower Receiver Finish: Type III Anodizing
• Fire Control Group: MIL-STD STYLE AMBI
• Buffer Tube: Carbine MIL-STD
• Stock Adjustment: 6 Postion
• Stock: B5 BRAVO
• Magazine: 450 7 Round