Safariland 6360 Level 3 Retention ALS Duty Holster, Mid-Ride, Black, STX High Gloss, Glock 21 with M3 Level III Retention, ALS (Automatic Locking System) secures weapon once holstered, also features the SLS (Self Locking System) Rotating Hood Low-Ride level Mid-Ride, this slim, compact design allows weapon to ride close to the body Simple straight up draw once all releases are deactivated 2.25" (58mm) belt slots ALS Automatic Locking System secures weapon once holstered; simple straight up draw once all releases are de-activated Slim, compact design allows weapon to ride close to body Level III Retention Hood Guard is standard on 6360 holsters Mid Ride belt loop