ALS (Automatic Locking System) secures weapon once holstered; simple straight up draw once ALS is deactivated by thumb while obtaining shooting grip Comes with both the paddle attachment and a standard belt loop, making this holster as versatile as it is functional For use with red dot optic-equipped weapons The 6378RDS holster is specifically designed for firearms with red dot sights. The holster features the ALS which locks the firearm securely in place when holstered but still allows a natural draw with a swipe of the thumb release as you establish your grip. SafariLaminate construction makes the holster strong on the outside, while SafariSuede on the inside protects your firearms front sight and finish. Gun fit: Glock 17 MOS ITI M3 Glock 17 MOS Streamlight TLR-1 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 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