This Magnifier offers users of the Holographic Sight (Compatible all models) the additional advantage of vastly improved target recognition.(Works with all Holographic Sights)  The G33 Magnifier is Designed to be used behind an Holographic Sight (HWS). The magnifier can be mounted directly behind the HWS. Simply switch the magnifier out of the way and operate the sight. When used with HWS models 518, 558, 556, 517, EXPS or 516 HWS (with side button interface) the user can easily operate the sight even with the magnifier in the locked position.  Made of high grade aluminum alloy . offers a wider field of view, better eye relief, a brighter image, and a more true color tone. Super clear lens and imaging, providing the operator with maximum situational awareness