Radical Firearms 5.56mm NATO 16in Forged Black Anodized Semi Automatic Modern Sporting Rifle – 30+1 Rounds – Regardless if its your first or fiftieth, a Radical Firearms AR rifle will not disappoint. The 16in Socom 5.56mm AR rifle uses M4 MIL-STD Upper and lower receivers along with Radical’s 12in M-Lok Thin Rail free float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. The MFT Grip and MFT Stock provide a comfortable hold on the rifle whether prone or upright.