The Trijicon RMR-Footprint Quick Release 45° Offset Mount is a Picatinny-compatible, low-profile, matte black anodized aluminum accessory designed to mount a Trijicon red dot sight using the RMR footprint. It mounts next to your primary optic at a 45° angle where it's useful for close range shooting. It can be attached to the right or left side of the weapon and is secured/removed tool-free with Trijicon quick release Q-LOC technology using one hand