Safariland Model 637 ALS Concealment OWB Belt Holsters Right Black 637-283-61. 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. Specifications for Safariland Model 637 ALS Concealment OWB Belt Holsters: Manufacturer: Safariland Gun Make: Glock Condition: New Package Contents: Safariland Model 637 ALS Concealment OWB Belt Holsters What firearm models does the manufacturer say Safariland Model 637 ALS Concealment OWB Belt Holsters is compatible with? The manufacturer says that Safariland Model 637 ALS Concealment OWB Belt Holsters is compatible with Glock 19 Glock 23 Glock 17 Glock 22Safariland 637-283-61: Model 637 ALS Concealment OWB Belt Holsters Right Black