9mm Para. cal., similar to the G17 Gen 5, except has 5.31 in. "match crown" barrel w/hexagonal rifling, Glock Marksman Barrel (GMB), with less aggressive polymid traction, 17 (optional 10 or24) shot mag., 4 1/2 lb. trigger pull, modular optic system (MOS) and adj. rear sight, grip without finger grooves, redesigned firing pin and safety, Rough Textured Frame (RTF), SF (Short Frame) includes interchangeable frame backstraps, ambidextrous slide stop levers, flared magwell, recessed thumb rests, accessories rail, reversible enlarged mag. catch, optional "FS" Front slide serrations, nDLC black finish, approx. 26 oz. New 2017.