9mm Para. cal., striker fired, DA, 4.02 in. match crown barrel with hexagonal rifling, Glock Marksman Barrel (GMB) with less aggressive polymid traction, 15, (optional 10, 17, 19, 24, or 31) shot mag., features GLOCK MOS (Modular Optic System), "FS" (Front slide serrations) and lower rail for mounting accessories, 5 1/2 lb. trigger pull, reversible enlarged mag. catch, ambi slide stop levers, grip without finger grooves, redesigned firing pin and safety, Rough Textured Frame (RTF), SF (Short Frame) includes interchangeable frame backstraps, flared magwell, recessed thumb rests, nDLC black finish, 23.81 oz. New late 2018.