USED Safariland Model 537 GLS Belt Slide Holster Glock 19/23/32 Right Hand Plain Black. Features of Safariland Model 537 GLS Open Top Concealment Slide Holster GLS (Grip Lock System) secures weapon once holstered; retention is deactivated with the middle finger upon a standard shooting grip on the weapon Soft flexible holster body allows holster to mold around wearer Tension adjustment to customize tailor weapon fit to user preferences Package Contents: Safariland Model 537 GLS Belt Slide Holster - Glock Handguns Only What firearm models does the manufacturer say Safariland Model 537 GLS Belt Slide Glock Holster is compatible with? The manufacturer suggests that Safariland Model 537 GLS Belt Slide Glock Holster is compatible with Glock 19 Glock 23 Glock 32 Glock 31 Glock 17 Glock 22Safariland 537-283-61: Model 537 GLS Belt Slide Holster Glock 19/23/32 Right Hand Plain Black