The fast optic riser securely elevates direct-to-rail mounted red dot optics with a standard lower 1/3 co-witness picatinny mount to a 2.26 optical center line.The fast optic riser provides an elevated m1913 picatinny platform for direct attachment of optics, such as eotech exps, vortex uh-1 and other lower 1/3 co-witness optics.It can be paired with any fast ftc (flip-to-center) magnifier mount.It comes standard with a two cross bolt rail clamp, but is compatible with the fastqd (quick detach) lever (as of aug.2023).Length: 3.60"Model: Fast Optic RiserMaterial: 7075 T-6 AluminumPieces: 1Mount Type: Picatinny RailRings Included: No