✔ TACTICON IS A COMBAT VETERAN OWNED COMPANY ✔ STURDIEST AND MOST DEPENDABLE RED DOT MAGNIFIER ON AMAZON - Incredibly fast target acquisition with 2.5 inches of eye relief. Incredibly easy to center the dot in the lens..✔ INCLUDED FLIP-TO-SIDE MOUNT WITH OPTIONAL SHIM - We've engineered this flip-to-side picatinny rail mount to allow you to shoot either 1X or 3X magnification by simply pushing the magnifier to the side. A 3mm shim is included to increase the vertical height of the magnifier to match the elevation of almost any red dot optic..✔ 3X CRYSTAL CLEAR MAGNIFICATION - We offer 2.5 inches of eye relief with a focus adjustment on every red dot magnifier. Each lens is coated for anti-glare and the glass is sourced from Germany..✔ WORKS WITH ALL RED DOT SIGHTS! This magnifier was engineered to be cross-compatible with all brands of red dot optics such as EO Tech, Sight Mark, Aimpoint, Holosun, etc. However, we engineered this to work absolutely perfectly with all of our Tacticon branded optics..✔ LIFETIME WARRANTY AND 100% SATISFACTION GUARANTEE! A no hassle 100% satisfaction guarantee with every magnifier and a lifetime warranty included with your purchase. We're a real USA company with real humans answering phones to answer your questions and honor warranty claims!