Location: Phoenix, Arizona

POF-USA specializes in the design, manufacturing and marketing of AR-style rifles, upper receivers, lower receivers, and gun accessories. It specializes in gas piston-operated AR-style rifles. Began in 2002. POF-USA specializes in high-performance metal finishes and coatings, including NP3 coatings and hard, corrosion-resistant, nitride heat-treated barrels and gas blocks, eliminating any requirement for lubrication. Innovations developed by POF-USA include the integral bolt-carrier key with the interface behind the cam pin, oversized heat-sink barrel nut, roller cam pin, and regulating gas plug.