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.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. FeaturesALS (Automatic Locking Systems) secures weapon once holstered; simple straight up draw once release is deactivatedOpen-top design without SLS for quick retrieval of weaponIncludes QLS 19 Locking Fork ONLYFor use with red dot optic-equipped weaponsSafariLaminate thermal-molded construction protects handgun and sightsSuede lined to protect handgun's finish