[Big Shrek]

Either a DIP Pic Rail or a One-piece Leaper's-type mount.

DIP rail allows you to use regular rifle rings & the quik-change rings also, if you have a good scope you don't mind switching around on rimfires.

http://www.diproductsinc.com/Detail.aspx?PROD=164828&CAT=3603

My Marlins wear DIP mounts, if they use scopes...less fussing about.