NcStar tactical Red/green/Blue dot sight with cantilever Weaver mount. Features: - Unlimited eye relief - black anodized aluminum construction - three brightness settings for the Red, green, Blue dots - 30mm cantilever Weaver style mount for mounting onto most Weaver style/Picatinny rails - Red, green, and Blue LEDs (light Emitting Diode) 100% safe for the eyes. Specifications:- length: 5.0' - width: 2.7' - height: 3.1' - weight: 8.9 oz. - mount length: 2.68' - objective lens diameter: 35mm - magnification: 1x - reticle: Red, green, & Blue dot - dot size: 3 MOA - click value: 1 MOA - lens coating: Platinum - battery type: CR2032