The Glock G19 Gen5 MOS in a Olive Drab package is a popular choice for Shooters. This Mid-Size pistol features a Durable Lightweight frame and a Melted Steel slide. The MOS (Modular Optic System) allows for easy Mounting of a variety of Red Dot Sights, Boosting your Accuracy. Factory Options include three Cylinders and a Holster. The G19 Gen5 MOS