The Safariland Model 637 is a great combination of superb retention and concealability. This belt slide holster features the ALS locking retention system, which secures the firearm in place once holstered, allowing an instinctive, straight-up draw once the release is deactivated via the thumb. The 637 features a low-profile design with a soft, flexible body that allows the holster to mold around the wearer and sit higher and tighter on the hip. A tension adjustment provides a customized firearm fit to the user and is available in Plain Black finish. Gun fit: Glock 17 Glock 22