EA G43 3x Magnifier with QD Flip Mount

EA G43 3x Magnifier with QD Flip Mount Aluminum Construction 3X magnification Eye relief is roughly 3" or 7.6cm which is fairly standard for this style of magnifier Fit to Mount on 20mm Picatinny Rail System Handguard (Slide Folding System Mount) Waterproof, anti-fog and shockproof Fully Adjustable Windage and Elevation Length: 80mm