Since the rifle has the 3/8" dovetail for the Tip-Off mount, you either have to use the standard Tip-Off mount or get a Weaver adaptor to use the standard Weaver-type rings. The Weaver .22 Tip-Off at WalMArt runs about $10.00. I just mounted a long-eye relief 2.5X Simmons on mine. The eye relief is long enough so the rear of the scope is just far enough forward so the hammer can be grabbed. You will have to get a hammer extension if the scope objective is too far back. Of course you can use a see-thru mount to raise the scope high enough to give access to the hammer, but then it is too high.