The M3G and the D3G are the latest version of our venerable M2/D2 sights. More efficient with over 100x the battery life (2000+ hours!!) and with it's smaller, more robust, sleek housing, it is sure to be the perfect fit on your rifle or shotgun. With a rugged body of 6061 T6 aluminum and optic quality glass lens the M3G/D3G are the new standard for a lightweight compact reflex sight. The shaded 34mm reflex lens provides a large image field so you don't miss anything, it's Parallax-free with unlimited eye relief.