ALS (Automatic Locking System) secures weapon once holstered SLS allows for a smoother, single-motion draw and greater protection against attempted weapon takeaways Drop-rig Tactical holster designed for maximum security Simple straight-up draw once all releases are deactivated Silicone-backed dual leg straps minimize movement Leg shroud accepts ELS, QLS, and MLS mounts Durable SafariLaminate construction SafariSuede lining protects finish and sights against wear The Safariland 6305 Tactical holster features the ALS (Automatic Locking System) to lock the firearm in all directions upon holstering, while the rotating hood of the SLS (Self Locking System) clicks into place for additional security, and Level III Retention. Both mechanisms release quickly to allow for a smooth, easy draw with no twisting required. The 6305 features the quick-release double leg strap and leg shroud with detachable buckle for low-profile carry. The SafariSuede lining and molded sight track help protect the gun's sights and finish. Constructed from thermoformed SafariLaminate, the 6305 holster is extremely durable and rugged to protect the firearm from scuffs, scratches and dents. Gun fit: Glock 21 Gens 1-4 SureFire X200 Glock 21 Gens 1-4 SureFire X300 Glock 21 Gens 1-4 Nightstick TWM-850S Glock 20 Gens 1-4 SureFire X200 Glock 20 Gens 1-4 SureFire X300 Glock 20 Gens 1-4 SureFire X300U Glock 20 Gens 1-4 Streamlight TLR-1 Glock 20 Gens 1-4 Streamlight TLR-1HL Glock 20 Gens 1-4 ITI M3 Glock 20 Gens 1-4 Inforce APL Glock 20 Gens 1-4 Nightstick TWM-350 Glock 20 Gens 1-4 Nightstick TWM-350S Glock 21 Gens 1-4 SureFire X300U Glock 20 Gens 1-4 Nightstick TWM-850 Glock 20 Gens 1-4 Nightstick TWM-850S Glock 21 Gens 1-4 Streamlight TLR-1 Glock 21 Gens 1-4 Streamlight TLR-1HL Glock 21 Gens 1-4 ITI M3 Glock 21 Gens 1-4 Inforce APL Glock 21 Gens 1-4 Nightstick TWM-350 Glock 21 Gens 1-4 Nightstick TWM-350S Glock 21 Gens 1-4 Nightstick TWM-850