Tube Red Dot Reflex Optic with 42mm objective lens allows the shooter a wide field of view to quickly acquire, aim, and engage their target. Integrated weaver type mount will fit on virtually any Weaver, Picatinny, MIL-STD 1913 type rails. LED (Light Emitting Diode) 100% safe for the eyes. Unlimited Eye Relief for flexible mounting. Includes flip-up lens covers to protect the ocular and objective lens when not in use. Multi-position rheostat knob for seven brightness settings for the Red Dot optic. Integrated mount will mount onto virtually any firearm with a Weaver, Picatinny, MIL-STD 1913 type rails. Black Anodized Aluminum Construction.