1-Piece Base For Weaver Style, Black: Type: 1-Piece BaseModel: Weaver-Style BasesStyle: WeaverMisc: .38″Finish: BlackMaterial: AluminumRings Included: No This converts 3/8-inch dovetail base (as found on many 22 rimfire rifles) to standard Weaver base. Mounting hardware included
- 3/8″ To Weaver Style Black