the Fenix ALG-05 tactical remote pressure switch mount is specially designed for Fenix AER series tactical remote pressure switches (remote pressure switches must be purchased separately). With a simple push, quickly and easily attach the mount to any standard Picatinny rail. This creates a secure hold for the AER pressure switch. The body of the mount is made of aluminum alloy with hard-anodized finish, and it is non-reflective with a matte black finish, making it better for tactical concealment.