Glock PX4350201FRMOS: Chambered in 9x19, the G43X MOS features slide cuts designed for specific micro-optics and the GLOCK Slim Mounting Rail for mounting accessories. The perfect tactical partner in the well-known GLOCK Slimline design for comfortable concealability.The G43X MOS has a short subcompact barrel length and a comfortably balanced, versatile compact-size grip with a minimal profile. It incorporates the Slimline series elements 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. The slim magazine is built-in reliable GLOCK style. It has an orange magazine follower for higher visibility and is specifically developed to ensure the 10 rds magazine capacity. Note: The G43X with the Modular Optic System (MOS) does not come with adapter plates or an optic.