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: Sig Sauer P320 RX 9 ITI M3 Sig Sauer P320 RX 9 Streamlight TLR-1 Sig Sauer P320 RX 9 Vortex Viper Sig Sauer P320 RX 9 Burris FastFire Sig Sauer P320 RX 9 Inforce APL Sig Sauer P320 RX 9 Nightstick TWM-350 Sig Sauer P320 RX 9 Nightstick TWM-350S Sig Sauer P320 RX 9 Nightstick TWM-850 Sig Sauer P320 RX 9 Nightstick TWM-850S Sig Sauer P320 RX 40 ITI M3 Sig Sauer P320 RX 40 Streamlight TLR-1 Sig Sauer P320 RX 40 Streamlight TLR-1HL Sig Sauer P320 RX 9 Streamlight TLR-1HL Sig Sauer P320 RX 40 SureFire X200 Sig Sauer P320 RX 40 SureFire X300 Sig Sauer P320 RX 40 SureFire X300U Sig Sauer P320 RX 40 Leupold Deltapoint Sig Sauer P320 RX 40 Trijicon RMR Sig Sauer P320 RX 40 Dr. Optic Sig Sauer P320 RX 40 J Point Sig Sauer P320 RX 40 Vortex Viper Sig Sauer P320 RX 40 Burris FastFire Sig Sauer P320 RX 40 Inforce APL Sig Sauer P320 RX 9 SureFire X200 Sig Sauer P320 RX 40 Nightstick TWM-350 Sig Sauer P320 RX 40 Nightstick TWM-350S Sig Sauer P320 RX 40 Nightstick TWM-850 Sig Sauer P320 RX 40 Nightstick TWM-850S Sig Sauer P320 X-Full 9 ITI M3 Sig Sauer P320 X-Full 9 Streamlight TLR-1 Sig Sauer P320 X-Full 9 Streamlight TLR-1HL Sig Sauer P320 X-Full 9 SureFire X200 Sig Sauer P320 X-Full 9 SureFire X300 Sig Sauer P320 X-Full 9 SureFire X300U Sig Sauer P320 RX 9 SureFire X300 Sig Sauer P320 X-Full 9 Leupold Deltapoint Sig Sauer P320 X-Full 9 Trijicon RMR Sig Sauer P320 X-Full 9 Dr. Optic Sig Sauer P320 X-Full 9 J Point Sig Sauer P320 X-Full 9 Vortex Viper Sig Sauer P320 X-Full 9 Burris FastFire Sig Sauer P320 X-Full 9 Inforce APL Sig Sauer P320 X-Full 9 Nightstick TWM-350 Sig Sauer P320 X-Full 9 Nightstick TWM-350S Sig Sauer P320 X-Full 9 Nightstick TWM-850 Sig Sauer P320 RX 9 SureFire X300U Sig Sauer P320 X-Full 9 Nightstick TWM-850S Sig Sauer P320 X-Full 40 ITI M3 Sig Sauer P320 X-Full 40 Streamlight TLR-1 Sig Sauer P320 X-Full 40 Streamlight TLR-1HL Sig Sauer P320 X-Full 40 SureFire X200 Sig Sauer P320 X-Full 40 SureFire X300 Sig Sauer P320 X-Full 40 SureFire X300U Sig Sauer P320 X-Full 40 Leupold Deltapoint Sig Sauer P320 X-Full 40 Trijicon RMR Sig Sauer P320 X-Full 40 Dr. Optic Sig Sauer P320 RX 9 Leupold Deltapoint Sig Sauer P320 X-Full 40 J Point Sig Sauer P320 X-Full 40 Vortex Viper Sig Sauer P320 X-Full 40 Burris FastFire Sig Sauer P320 X-Full 40 Inforce APL Sig Sauer P320 X-Full 40 Nightstick TWM-350 Sig Sauer P320 X-Full 40 Nightstick TWM-350S Sig Sauer P320 X-Full 40 Nightstick TWM-850 Sig Sauer P320 X-Full 40 Nightstick TWM-850S Sig Sauer P320 RX 9 Trijicon RMR Sig Sauer P320 RX 9 Dr. Optic Sig Sauer P320 RX 9 J Point