The 6390RDS holster is specifically designed for firearms with red dot sights mounted to them. This open-top holster features the Automatic Locking System (ALS), an internal locking device that retains the weapon in all directions with no straps or snaps to manipulate. Once the weapon is holstered, it locks into place. The holster is completely operable with the thumb and once the ALS is deactivated a simple straight-up draw is used. Features a low-ride belt loop that is 1.5” lower than standard, rides close to the body, and has a suede lining to protect the gun’s sights and finish. Gun fit: Glock 17 MOS ITI M3 Glock 17 MOS Streamlight TLR-1 Glock 17 MOS Vortex Viper Glock 17 MOS Burris FastFire Glock 17 MOS Inforce APL Glock 17 MOS Nightstick TWM-350 Glock 17 MOS Nightstick TWM-350S Glock 17 MOS Nightstick TWM-850 Glock 17 MOS Nightstick TWM-850S Glock 17 MOS Streamlight TLR-1HL Glock 17 MOS SureFire X200 Glock 17 MOS SureFire X300 Glock 17 MOS SureFire X300U Glock 17 MOS Leupold Deltapoint Glock 17 MOS Trijicon RMR Glock 17 MOS Dr. Optic Glock 17 MOS J Point