The Radical Firearms 16″ HBAR Contour 300BLK AR rifle uses MIL-STD Upper and lower receivers along with our 15″ RPR 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!

Barrel Length: 16″
Barrel Material: 4140 Chrome-Moly Vanadium Steel
Barrel Finish: Melonite
Barrel Profile: HBAR Contour
Barrel Thread Pitch: 5/8×24
Chamber: 300BLK
Twist Rate: 1:8
Barrel Extension: M4 Feed Ramps
Gas System: Pistol 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: MIL-STD
Dust Cover: MIL-STD
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
Buffer Tube: Carbine MIL-STD
Stock Adjustment: 6 Position
Stock: B5 BRAVO
Magazine: 5.56 30 Round