The HM Defense(R) RaiderM is a compact semi automatic AR pistol chambered in 223 Rem and 5.56x45mm NATO. Its 12.5 in match grade Monobloc barrel incorporates an integrally machined gas block to support accuracy and dependable operation. The pistol combines forged aluminum receivers a free floating Picatinny rail and a black hard coat anodized finish.Key Features12.5 in match grade Monobloc barrelIntegrally machined gas block1:8 twist rate1/2 x 28 threaded muzzle10.38 in free floating Picatinny railForged aluminum upper and lower receiversM16 pattern bolt carrier groupBlack hard coat anodized receiver finishHM Defense(R) designs and manufactures firearms and firearm components with an emphasis on modern engineering durability and performance. The company produces rifle platforms and proprietary components for sporting and long-range shooting applications. HM Defense products combine modern manufacturing processes with performance-focused firearm designs.