Glock 17 Gen4 MOS 9mm Luger 4.49in Black Pistol - 17+1 Rounds - Fullsize

Glock G17 Gen4 MOS 9mm Luger 4.49in Black Pistol - 17+1 Rounds - The Glock 17 Gen4 in Modular Optic System (MOS) configuration is a full-sized, optics-ready pistol perfect for duty and self-defense. The MOS configuration makes it easy to mount a miniature reflex sight on the pistol's slide without the need for a new slide or separate mounting system. Modular Optic System Mount Safe Action System The Glock 17 comes in a variety of models and configurations.