No Bases Required
1" rings with integral bases for .22 rifles with 3/8" (9.52mm) dovetail receiver grooves. No bases required.
Big Book Catalog, Issue:67, Page:266
SPECS: Top Mount ring with integral base. Polished blue or
satin stainless finish. 1"
(2.5cm) I.D. Symmetrical (Sym) have caps with two
screws on each side, available 1" only.