The Picatinny/Weaver rail mounted Sightmark XT-3 Tactical Magnifier features a 23mm objective lens, 3x magnification, Flip-to-Side LQD Mount, rugged 6061-T6 aircraft-grade aluminum tube, rubber armor, premium fully multi-coated glass, and a 30mm tube. The XT-3 Tactical Magnifier is shockproof, fogproof, dustproof and IP67 waterproof for reliable performance anytime, anywhere.