Use the AR-Stoner Cantilever Scope Mount to mount optics on an AR-15 flattop receiver. At an ideal height for many MSR rifles the cantilever ring mount positions the center of the rifle scope tube at a height of 1.4" from the base. The clamping surface securely tightens to picatinny-style rails that may even be slightly out of spec. CNC machined from solid 6061-T6 aluminum and features a hard coat Type 3 Mil-spec anodized finish for a uniform looking, protective, and lasting finish. Features6061-T6 AluminumHard coat Type 3 Mil-spec anodized finishMSR Ideal Height