The Aimpoint flip mount is a quick attach/detach mount that can be quickly flipped in or out of the optical axis. The flip-mount is designed primarily for use with Aimpoint magnifiers, but can also be used to mount other optical equipment with a 30mm tube. The flip-mount is offered in two different heights to accommodate various sight mounts. Specifications: - total height: 1 1/2" (for HK416) - length: 1.60" - width: 2.10" - weight: 4.0 oz