Our G33 Magnifier mounts directly behind a 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. B: Reticle color switch (Red/Green).This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser". The seller is "magorui2017" and is located in this country: US. This item can be shipped to United States.