Special grip frame includes interchangeable backstrap inserts and lateral plates for a customized fit; MIL-STD-1913 rail on frame enables seamless integration of tactical lights, lasers and other accessories; Corrosion-proof fiber reinforced polymer frame ensures long-lasting durability in harsh conditions; Polygonal bore profile increases velocity, simplifies cleaning and extends barrel life; Multiple trigger firing modes enable user customization for different shooting applications; Comes with 17-round and extended 20-round magazines; Automatic hammer and firing pin safeties ensure reliable and secure operation