The FAST MRO (Miniature Rifle Optic) mount is designed for the Trijicon MRO and Trijicon MRO HD. It features a built-in, fully adjustable rear back-up iron sight that is compatible with a standard front sight for a traditional sight radius. It comes standard with a 2 cross bolt rail clamp, but is compatible with the FAST QD (Quick Detach) Lever. It can be paired with any FAST FTC (Flip-to-Center) magnifier mount.FAST is a series of optic mounting solutions that provides end users with a quicker sight picture than standard height mounts. FAST mounts position most optics at a 2.26" optical centerline from the rail, which allows for more rapid visual processing of the battlefield by ensuring an ergonomically correct heads-up posture. Further, they provide faster and easier dot/reticle acquisition while wearing night vision goggles, protective masks, plate carriers and other gear.