The Radical Firearms FP75556M47RPR Forged RPR 5.56x45mm NATO AR pistol brings a compact 7.5" M4 profile barrel and 1:7 twist to shooters who need a hard-hitting short-barrel platform for personal defense, patrol work, or fast-paced range sessions, featuring a 4140 chrome moly vanadium barrel with Melonite finish and M4 feed ramps for durability and reliable feeding. Built on forged 7075 T6 MIL-STD upper and lower receivers with Type III anodizing, this RPR model pairs a 7" free-float M-LOK thin rail that keeps the hand cool while providing real estate for lights and optics, and a .750 low-profile gas block with a pistol-length gas system tuned for reduced recoil impulse in a compact package. The pistol tube buffer, MIL-STD charging handle, forward assist, and dust cover maintain service-style ergonomics, while the A2 flash hider and 1/2x28 threaded muzzle accept common suppressors and compensators. With a MIL-STD fire control group and a black polymer grip, the Radical Firearms RPR AR pistol is an accessible short-barrel option for shooters seeking a rugged, configurable 5.56 platform that balances mobility and ballistics for defensive and tactical applications; FFL transfer is required.