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 34 MOS ITI M3 Glock 34 MOS Streamlight TLR-1 Glock 34 MOS Vortex Viper Glock 34 MOS Burris FastFire Glock 34 MOS Inforce APL Glock 34 MOS Nightstick TWM-350 Glock 34 MOS Nightstick TWM-350S Glock 34 MOS Nightstick TWM-850 Glock 34 MOS Nightstick TWM-850S Glock 35 MOS ITI M3 Glock 35 MOS Streamlight TLR-1 Glock 35 MOS Streamlight TLR-1HL Glock 34 MOS Streamlight TLR-1HL Glock 35 MOS SureFire X200 Glock 35 MOS SureFire X300 Glock 35 MOS SureFire X300U Glock 35 MOS Leupold Deltapoint Glock 35 MOS Trijicon RMR Glock 35 MOS Dr. Optic Glock 35 MOS J Point Glock 35 MOS Vortex Viper Glock 35 MOS Burris FastFire Glock 35 MOS Inforce APL Glock 34 MOS SureFire X200 Glock 35 MOS Nightstick TWM-350 Glock 35 MOS Nightstick TWM-350S Glock 35 MOS Nightstick TWM-850 Glock 35 MOS Nightstick TWM-850S Glock 34 MOS SureFire X300 Glock 34 MOS SureFire X300U Glock 34 MOS Leupold Deltapoint Glock 34 MOS Trijicon RMR Glock 34 MOS Dr. Optic Glock 34 MOS J Point