The Kel-Tec PR57 in 5.7x28mm is a striker-fired semi-automatic pistol with a 4.6 inch barrel and a 20+1 capacity built around an internal feed system that eliminates the need for a detachable magazine. Its green polymer frame and matte black slide create a compact, durable platform that keeps bulk down while still offering impressive onboard storage. With optics ready capability and two included stripper clips, it is designed for fast loading, reliability, and modern high stress versatility.