The DRGB is a Small Tube Tactical Red Dot Reflex Optic with a Cantilever mount. The Cantilever mount will mount onto nearly any Weaver/Picatinny type rails. The scope features a Rheostat knob with three brightness levels for each of the Red, Green and Blue Dot reticles, black ocular and objective flip-up lens covers for a nice contrasting look. Includes Cantilever mount, flip up lens covers, battery and mounting tools.