Radical Firearms AR-15 Features The Radical Firearms AR-15 is built around a 16 inch barrel with an HBAR contour machined from 4140 chrome-moly vanadium steel and finished in Melonite for corrosion resistance and a smooth bore. A 1:8 twist rate is matched to .300 AAC Blackout stabilizing both supersonic and subsonic loads for versatile performance across different ammunition choices. The barrel s 5/8x24 threaded muzzle ships with an A2 flash hider and accepts aftermarket muzzle devices like a compensator or suppressor. A pistol-length gas system paired with a low-profile .750 gas block keeps the action cycling reliably across a range of .300 AAC Blackout loads. The 15 inch RPR free float M-LOK handguard surrounds the barrel without contacting it improving accuracy while giving the shooter ample space to mount lights grips or other accessories. Forged 7075-T6 upper and lower receivers follow M4 mil-spec dimensions finished in Type III anodizing for durability against wear and the elements. A six-position carbine stock with MFT Minimalist furniture keeps the rifle lightweight and adjustable for different body types and shooting positions. This Radical Firearms AR-15 ships with one 30-round magazine and is available for sale at GrabAGun for shooters building a dependable .300 AAC Blackout platform. Radical Firearms AR-15 Specifications Manufacturer: Radical Firearms Model: AR-15 Type: Semi-Auto Rifle Caliber: .300 AAC Blackout Barrel Length: 16 Barrel Material: 4140 Chrome-Moly Vanadium Steel Barrel Profile: HBAR Contour Barrel Thread Pitch: 5/8x24 Finish: Anodized Optic Ready: Picatinny Rail Stock Material: Synthetic Handguard Length: 15 Free Float M-LOK Receiver Material: Forged 7075 T6 Magazines Included: 1 Capacity: 30 Rounds Available At: GrabAGun