Quick-detach mount for Aimpoint 3x Magnifier lets you change instantly from long-range to CQB shooting modes. Simply depress the release lever, twist the Magnifier, and lift it off for an unencumbered close-range sight picture. Low-profile base clamps Picatinny-style rail; extra-long scope ring provides ample surface contact area for a no-slip grasp on the magnifier body. May also be used as a quick-detach mount for other 30mm optics. Extra TwistMount bases sold separately, so you can quickly move your Magnifier from one rifle to another. Co-Witness Spacer (available separately) raises sight axis for proper co-witnessing with factory-height backup iron sights. Blends smoothly into contours o Mfg: Aimpoint SPECS: Aluminum, hardcoat anodized, matte black.