Designed to attach behind the LT-mounted Aimpoint Comp M2, M3 and M4's, The LT755 places an Aimpoint 3X Magnifier in perfect, 1.725" centerline height-alignment...providing proper cheek-weld. With durability and simplicity in-mind, the angled spring-tensioned pivoting arm rotates on a robust shaft. No buttons, no switches, no delicate places to fill with sand. You simply grab the optic one-handed, pull back, move it in-position, release, and you're good-to-go. Once it's in position, it does not move unless you want it to. The design allows the Aimpoint 3X to fit over top of most flip-up rear sights.The LT755 shown fits 30mm bodies, such as the Aimpoint 3X Magnifier. The mount is available by itself, or as a Aimpoint 3X combo special. Both Mounts and Combo packages come complete with QD adjustment wrench, vial of blue Locktite and Instructions.