"Glock 45, chambered in 9 mm. Features include: 4.02 in. ""match Crown"" barrel with hexagonal rifling, (GMB - Glock Marksman Barrel), has Model 17 size grip and Model 19 size slide, interchangeable frame backstraps, ambidextrous slide stop levers, reversible enlarged magazine catch, no finger grooves with flared magwell (FS) Front slide serrations, recessed thumb rests, new trigger system, and mounting accessories rail, modular backstrap system (MBS), 17 shot mag., 5 ½ lb. trigger pull. ""Less Aggressive"" Polymid Traction Rough Textured Frame (RTF) nDLC black finish, approx. 25 oz. TLR-7X Steam light has been added and the Vortex Defender-ST is attached from a dovetail mount in place of the rear sights."