This optics magnifier adds 3X variable magnification to your standard red dot sight and maintains an expansive field of view with comfortable 2.4 inches eye relief Fully multicoated clear glass for sharp sight picture, ensure good resolution, enhanced light gathering capabilities, and provide solid color fidelity The quick-release mount with included a lower 1/3 co-witness spacer, with a fast flip-to-side engagement. The push-button design engages and disengages the flip mount, locking into place the magnifier. Designed to work with Absolute and lower 1/3 co-witness red dot scope