Vortex Optics Tactical 30mm Riflescope Ring — Lower 1/3 Co-Witness [1.57 Inches | 40.0 mm] , Black
The vortex tactical 30mm riflescope ring, extra-high, lower 1/3 co-witness, 1 ring (TRXH) mounts on Pica tinny rails - positioning the riflescope 1.57 inches (40mm) from base to center for lower 1/3 co-witness.