UNITY TACTICAL FAST PRO STANDARD 30MM RAIL MOUNT The FAST(TM) PRO(TM) Mount positions the AimpointA(R) Patrol Rifle Optic (PRO(TM)) Red Dot Reflex Sight at a 2.26a ^2 optical centerline from the rail. It is also compatible with other optics of industry standard 30mm footprint. 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. Very compact, it covers only three slots on an M1913 Rail. It comes standard with a 2 cross bolt rail clamp and can be paired with any FAST(TM) FTC (Flip-to-Center) magnifier mount. FAST(TM) is a series of integrated optics an Mfg: Unity Tactical