The Safariland 6304 ALS/SLS Tactical Holster is designed to ensure the maximum safety your firearm. The ALS (Automatic Locking System) secures the firearm upon holstering, while the SLS (Self Locking System) clicks into place for additional safety. Both mechanisms release quickly to allow a smooth, efficient draw when every second counts. Constructed from thermoformed SafariLaminate, the 6304/6305 holster handles harsh environments, and the soft suede lining and molded sight track protect your firearm’s finish and sights. The wide shroud and dual elastic straps add comfort and stability, and silicone grip strips help eliminate movement. Mounting holes on the shroud accept ELS, QLS and MLS accessories, making the 6304 ideal for gear-heavy roles. Gun fit: Glock 21 Gens 1-4 ITI M3 Glock 21 Gens 1-4 Streamlight TLR-1 Glock 21 Gens 1-4 Nightstick TWM-850S Glock 20 Gens 1-4 ITI M3 Glock 20 Gens 1-4 Streamlight TLR-1 Glock 20 Gens 1-4 Streamlight TLR-1HL 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 Inforce APL Glock 20 Gens 1-4 Nightstick TWM-350 Glock 20 Gens 1-4 Nightstick TWM-350S Glock 21 Gens 1-4 Streamlight TLR-1HL Glock 20 Gens 1-4 Nightstick TWM-850 Glock 20 Gens 1-4 Nightstick TWM-850S Glock 21 Gens 1-4 SureFire X200 Glock 21 Gens 1-4 SureFire X300 Glock 21 Gens 1-4 SureFire X300U 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