Capable of bringing down a home invader or a hungry bear, this Glock G40 Gen 4 MOS is a polymer-framed pistol chambered in 10mm. It features a Modular Optics System that makes an easy job of mounting a reflex sight on the slide without the need for a new slide or separate mounting system. Additionally, the Modular Backstrap design and reversible magazine catch allow the user to instantly customize the grip to accommodate any hand size, while the stippled polymer grip with finger grooves ensures a comfortable and secure grasp with every shot fired.