POF-USA pistols feature a corrosion resistant nitride heat-treated barrel, triple-port muzzle device, semi-auto, gas piston operated, rotating bolt, 3-position gas system, single piece gas block, nitride heat-treated gas plug, chromed gas piston, billet machined, heat-treated, integral keyed, nickel plated bolt carrier, roller cam pin with chrome plated stem and NP3 coated roller, heat-treated chrome plated bolt, free-floating Modular Railed Receiver™ and interchangeable picatinny rail sections.