Safariland Model 6360 Als/sls Mid-ride Level Iii Retention Duty Holster For Glock 19 . The Als (automatic Locking System) Builds On The Foundation Of The Sls (self Locking System) To Offer Level Iii Retention . In Addition To The Sls Safariland's Patented Als Locks The Firearm Into Place Immediately Upon Holstering While The Rotating Hood And Tension Device Ensure Added Security. The 6360 Holster Can Be Easily Upgraded To Level Iv Retention Using The Optional Sentry Attachment. Specifications for Safariland Model 6360 Als/sls Mid-ride Level Iii Retention Duty Holster: Manufacturer: Safariland Retention Level: Level III Package Contents: Safariland Model 6360 Als/sls Mid-ride Level Iii Retention Duty Holster