Radical Firearms FR-16 300 AAC Blackout 16in Black Melonite Semi Automatic Modern Sporting Rifle – 30+1 Rounds – The Radical Firearms FR16 .300 AAC Blackout semi-automatic AR-15 rifle is built on a set of forged 7075 T6 aluminum receivers with a 16-inch SOCOM profile barrel, mid-length gas system, and Type III hard anodizing. This AR-15 features the Radical Firearms SHR M-LOK free-float handguard. This 15-inch thin handguard improves accuracy while offering plenty of room for accessories. The 4140 Chrome Moly Vanadium barrel of the FR16 features a 1 in 8 rate of twist, .750 low profile gas block, and standard A2 flash hider muzzle device. Also features a B5 Type 23 pistol grip and B5 6-position Bravo adjustable stock.