The Patent Pending Arisaka Low Aimpoint Micro Mount is designed for the Aimpoint Micro T1 and T2 optics, and will also function with other red dots using the same footprint, including the Aimpoint H1/H2, Aimpoint Comp M5/M5S, Aimpoint Duty, Sig Romeo 5, Vortex Crossfire, and Holosun HS503/515/530. The 0.9" optic centerline matches up with the Arisaka Low Magnifier Mounts, and is ideal for use on firearms like the IWI Galil Ace, SAN Swiss SG550/SG551/SG552/SG553, and AK platforms. Please note: the Aimpoint Comp M5S and Aimpoint Duty are 10mm taller than the regular Aimpoint Micro red dot sights, which must be factored into the final height of the optic, and will prevent them Mfg: Arisaka Defense