The Midwest Industries Quick-Release Picatinny-Style AR-15 mount is perfect for mounting your Vortex Sparc to your AR-15. The Precision machined for optimum return to zero performance and reliability. Features:The smoothest functioning QD lever on the marketSuperior clamping that will not damage on coin the rail surfaceExtremely smooth in operation with a multi-facetted adjustment nut to get the exact tension required by the operatorFully adjustable with no tools required, can be adjusted to fit rails not machined to mil-spec tolerancesPrecision machined for optimum return to zero performance and reliabilityHard coat anodized 6061 aluminum for a lifetime of service