Glock 17 Gen 4 MOS Description
9mm Para. cal., striker fired, DA, 4.49 in. barrel, 17 (optional 10, 19, or 33) shot mag., interchangeable frame backstraps with recessed thumb rests, finger grooves, (SF) Short Frame, rough textured frame (less polymid traction), standard to large size grip, reversible enlarged magazine catch, dual recoil spring assembly, new trigger system, adj. rear sight, features Glock MOS (Modular Optic System) and lower rail for mounting accessories. New 2015.
This model is currently only available to law enforcement (USA).