Warne Maxima Scope Mounting Bases2-Piece and 1-Piece Steel Weaver Style Scope Bases Warne Maxima Scope Mounting Bases are rigidly strong and perfectly aligned. They attached firmly with Torx screws, too. Specially made to fit Warne Maxima Rings, these bases will also accept most Weaver style rings, too. The cross slots on these Warne scope bases fit the locking keys on Warne Maxima Rings perfectly. See the fit chart below (most commonly ordered) for your proper base(s). Please see above drop-down menu, call 800-950-9088 or see the Warne PDF if your gun is not listed here.