The Radical Firearms 16" SOCOM 5.56mm AR rifle uses MIL-STD upper and lower receivers along with a 15" RPR 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. Regardless if it's your first or fiftieth, a Radical Firearms AR rifle will not disappoint!