Burris Optics Signature Pos-Align +/- 0.5mm Eccentric Offset Insert

This Signature Pos-Align +/- 0.5mm Eccentric Offset Insert from Burris Optics allows you to virtually sight-in your gun without moving the scope adjustments when used in conjunction with one of the Signature scope rings. By keeping the internal optics centred, you'll see the scope's intended clarity, sharpness, and brightness. The offset insert also corrects for any misalignment caused by receiver holes drilled off centre, or the bases or rings being slightly off perfect centre. For long-distance shooters, the insert removes the need for tapered bases or shimming.