Glock PX4350B01FRMOS8A4: The G43X MOS has a short subcompact barrel length and a comfortably balanced, versatile compact-size grip with a minimal profile. It incorporates elements of the Slimline series such as the short trigger distance, a frame with a built-in beavertail as seen on the G43 and the G42, a reversible magazine catch. This model has the incredibly accurate, match-grade GLOCK Marksman Barrel (GMB) of the Gen5 series as well as the tough nDLC finish on the slide. The G43X MOS also features precision-milled front serrations and a Aimpoint COA Optic.