Safariland 7390 7TS ALS Mid-Ride Level I Retention Duty Glock 17/22 Holster Level I Retention holster featuring the ALS (Automatic Locking System) which secures weapon once holstered A proprietary nylon blend (SafariSeven) that is completely non-abrasive to a firearm's finish Mid-ride level Open-top design without SLS for quick retrieval of weapon 2.25 inch (58mm) belt slots