Safariland 6304 ALS/SLS Drop-Leg Tactical Holster FDE Brown 6304-28325-551-SP6. 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. Specifications for Safariland 6304 ALS/SLS Drop-Leg Tactical Holster: Manufacturer: Safariland Holster Material: SafariLaminate Accessory Attachment System: Strap Holster Type: Drop Leg Holster Thigh Holster Condition: New Application: Tactical Features of Safariland 6304 ALS/SLS Drop-Leg Tactical Holster ALS (Automatic Locking System) secures weapon once holstered SLS allows for a smoother single motion draw and greater protection against attempted weapon takeaways Hood Guard is standard; optional Sentry available Simple straight up draw once all releases are deactivated Suede lined to protect handgun's finish Package Contents: Safariland 6304 ALS/SLS Drop-Leg Tactical Holster What firearm models does the manufacturer say Safariland 6304 ALS/SLS Drop-Leg Tactical Holster is compatible with? The manufacturer says that Safariland 6304 ALS/SLS Drop-Leg Tactical Holster is compatible with Glock 17 Glock 22 SIG Sauer P226R Glock 17 Gen 5 Glock 22C Gen 1 Glock 47 Gen 5 Glock 47 Gen 4 Glock 47 Gen 3 Glock 22C Gen 4 Glock 22C Gen 3 Glock 22C Gen 2 Glock 17C Glock 31 SIG Sauer P320 Glock 22 Gen 5 Glock 34 Gen 5 Glock 41 Glock 19 Gen 5Safariland 6304-28325-551-SP6: 6304 ALS/SLS Drop-Leg Tactical Holster FDE Brown