Safariland 6354RDSO ALS Tactical Holster, Fits Sig P320C with X300 Sized Light, Matte Finish, Multicam, Laminate Construction, Right Hand 6354RDSO-7502-701-MS19 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.