1X29 Mounting Railway red DOT scope /Red DOT rifle scope/Red DOT sight for Airsoft, CL2-0021Specification:Magnification: 1XObjective lens diameter: 29mm9 brightness adjustment20MM mounting system fit most picatinny/weaver railsQucik detachable designRed DOT elevation and windage adjustableRed illumiationC-more railway styleBattery: 2PCS AG13 button batteries* MAGNIFICATION: 1x* OBJECTIVE LENS DIAMETER: 29mm* 9 BRIGHTNESS ADJUSTMENT