Chosen and trusted by tip-of-the-spear U.S Armed Forces, our battle-tested G33 Magnifier mounts directly behind an EOTECH Holographic Weapon Sight (HWS). Delivers fast transitioning from 3X to 1X, tool-free vertical and horizontal adjustments, larger field-of-view, and an adjustable diopter for improved, precise focusing. When used with HWS Models 518, 558, and EXPS (with side-button interface), the user can easily operate the sight even with the magnifier engaged. FIXED MAGNIFICATION 3X LENGTH/WIDTH/HEIGHT 3.9 x 2.2"x 3.3" (99 x 55.9 x 83.9 mm) EYE RELIEF 2.2 (55.8 mm) FIELD OF VIEW 7.3 SEALING Fog resistant internal optics COUNTRY OF ORIGIN Assembled in USA