Triple color Red, Green, and Blue Dot Compact Tube Reflex Optic with 35mm objective lens allows the shooter a wide field of view to quickly acquire, aim, and engage their target. AR15/M4 11/2″ height 30mm cantilever weaver type mount will fit on virtually any Weaver, Picatinny, MIL-STD 1913 type rails. This model has the Black Anodized aluminum body.