Whether you want to mount a red dot sight, or a scope, the Midwest Industries QD Ring Mount has you covered. This forward slanted sight features a 30mm tube, which can be used alone or paired together to mount your favorite scope.Features:The smoothest functioning QD lever on the marketSuperior clamping that will not damage or coin the rail surfaceExtremely smooth in operation with a multi-facetted adjustment nut to get the exact tension required by the operatorCenter line height of 1.690 for a lower one third sight pictureFully adjustable with no tools required, can be adjusted to fit rails not machined to mil-spec tolerancesWeighs only 4.0 oz.Precision machined for optimum return to zero performance and reliabilityHard coat anodized 6061 aluminum for a lifetime of service