Glock 22 Gen5 MOS .40 S & W Semi-automatic Pistol You've waited patiently. And it's finally here. Introducing the first Gen5 .40-caliber Glock Pistol. With over 20 design modifications from its Gen4 predecessor, the G22 Gen5 is proof positive that even the most refined polymer pistol in the world can get better. Among the most notable changes is the Glock Marksman barrel with enhanced polygonal rifling that delivers a better gas seal and less fouling. The Gen5 preserves the reversible magazine catch of the Gen4, but goes one step further by incorporating a truly ambidextrous one-piece slide lock. That's a nice upgrade for you lefties out there. The magazine and mag well have also been overhauled. The magazine now features an orange follower so you can visually identify empties, as well as an extended lip for grip. The mag well has been flared for faster reloads. The finger grooves are now gone, and the front strap features a cut-out for extracting the magazine. Bottom line: it's the same Glock you know and love...only better. The Modular Optics System This model features the Modular Optics System, which makes it easy to mount optics without custom machining of your pistol's slide. The slide features a factory-cut removable plate that can be taken out and replaced with mounting plates-no custom machining necessary. Includes mounting plates for most popular red dot optics. Gen5 enhancements: Marksman barrel with enhanced polygonal rifling Ambidextrous one-piece slide lock makes it more lefty-friendly Orange follower in the magazine for easy identification of empties Extended bottom lip for easy magazine extraction Flared magazine well for easy reloads Straight-grip design fits all hands Front strap cut-out for extracting magazines Rounded front of the slide for easier holstering nDLC finish provides tougher, more durable corrosion and scratch resistanceOther features: Modular Optics System (MOS) makes it easy to mount optics wi