Safariland Model 6354do Als Optic Tactical Holster For Glock 17 Gens 1-4 . The 6354do Holsters feature the Automatic Locking System (als) and meet or exceeds the stringent demands of law enforcement military and special operations professionals. The holster locks the weapon in all directions upon holstering providing secure retention until it is removed. Included is a leg strap with shroud that features mounting holes for optional accessories. The Safariland 6354-do Holster also include the 3 hole pattern incorporated into the holster which allows the user to mount the holster in a variety of configurations with the use of the Quick Locking System (qls). Package Contents: Safariland Model 6354do Als Optic Tactical Holster For Red Dot Optic