From the manufacturer

Safariland Gun Holster 6390 duty Holster OWB Holster ALS Outside-the-waistband blackhawk holster

safariland 6390 holster duty police tactical

Safariland 6390RDS ALS Level 1 Retention Outside-the-Waistband (OWB) Duty Holster

The Safariland 6390 ALS Level 1 Retention OWB duty holster is designed for duty, and features the patented ALS (Automatic Locking System), which secures the weapon immediately upon holstering and stays that way until the user deactivates the device with the thumb as the weapon is drawn in an efficient, straight-up motion. It's specifically designed for firearms with red dot sights (RDS) mounted to them. The removable Hood Guard, an external shield over the thumb lever, provides additional safety by protecting the release mechanism against takeaway attempts. Further, this holster can be upgraded to Level 2 Retention with the optional ALS Guard. Constructed from durable, thermoformed SafariLaminate material, it features a suede lining to help protect the weapon’s finish.

ALS secures weapon once holstered
Optional ALS Guard available for increasing level of security to Level 2 Retention
Open-top design without SLS for quick retrieval of weapon

The holster attaches to belts up to 2.25” in diameter and is offered for mid-ride, hi-ride and low-ride carry.

** Safariland cannot assure that RDS holsters will be compatible with non-factory (Glock MOS, M&P CORE, etc.) mounted red dots. Numerous variables including depth of RDS into slide, use of dovetail, placement on slide, etc. can all affect the fit of the holster. This holster is not compatible with the Trijicon SRO optic.

Safariland Gun Holster duty Holster OWB Holster ALS Outside-the-waistband blackhawk holster

Safariland, 6390RDS, ALS Mid-Ride Level-I Retention Holster, Right Hand, Black, Fits Glock 17 w/Light, Polymer