I have the Weaver T0-1 Mount on mine, involves drilling 3 or 4 holes. The problem is it only takes the weaver .22 tip off mounts. Although, I have not had any issues with mine. It cost around $35 for the base, plus another $40 for the rings. The smith that did mine put a screw in front on the rear ring to prevent re-coil from forcing the rings forward on the base.



























