The 6354RDS features the Automatic Locking System (ALS®), an internal locking device that retains the firearm in all directions. Once the firearm is holstered, it "locks" into place, providing an extra measure of security. The ALS is completely operable with the thumb, making it very instinctive to use, once the device is de-activated a simple straight-up draw can be used. This holster has the QLS 19 Locking Fork installed. The QLS 19 Locking Fork can be used with any mounting platform (leg shroud, belt loop, etc.) that has the QLS 22 Receiver Plate installed.