- Type: Semi-Automatic
- Caliber/Gauge: 458 Socom
- Capacity: 10
- Safety: Dimpled Billet Ambidextrous Selector
- Grip Type: Black Polymer
- Barrel Material: 4150 Chrome Molybdenum Vanadium Steel
- Receiver Material: Forged 7075 T6 Aluminum
- Frame Material: Alloy
- Barrel Finish: Melonite
- Receiver Finish: Type III Anodized
- Frame Finish: Hardcoat Anodized Black
- Barrel Length: 10-1/2"
- Overall Length: 30"
- Barrel Profile: Hbar
- Barrel Thread: 5/8-32
- Twist Rate: 1:14"
- Barrel Extension: Single Feed Ramp
- Gas System: Pistol Length
- Gas Block Type: .936 Low Profile Gas Block
- Muzzle Device: Panzer Brake
- Handguard Type: Free Float
- Handguard Style: M-LOK Hybrid Rail
- Handguard Length: 9"
- Charging Handle: Mil-Std
- Fire Control Group: Mil-Std
- Buffer Tube: Carbine
- Pistol Brace: SB-Tactical SBA3
- Forward Assist: Yes
- Dust Cover: Yes
- Receiver Style: M4 Mil-Std
- Stock Material: Polymer
- Stock Finish: Black
The Radical Firearms 10-1/2 inches Hbar Contour 458 Socom AR Pistol uses MIL-STD Upper and lower receivers along with our 9 inches MHR free float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. Starting in 2019 we are excited to be adding the SB-Tactical SBA3 adjustable pistol brace line of pistols.