The 6354rdso Holster Is Designed For Firearms With Red Dot Sights. Its Automatic Locking System (als) Secures The Firearm. Unlike Safariland's Rds Series, The Rdso Has An Open Pocket That Protects The Optic And Does Not Use A Flip-up Dust Cover.image this Holsters Has The Qls 19 Locking Fork Installed. The Qls 19 Fork Can Be Used Any Mounting Platform (leg Shroud, Belt Loop, Etc.) That Has The Qls 22 Receiver Plate Installed.