Two-piece weaver-style scope bases for the ab3 rifle only.Made from machined aircraft grade alloy.Allows easy use of weaver-style rings that are appropriate to your scope.These bases will work with browning rings or just about any other weaver-style rings you want to mount on them.These fit the ab3 rifle only.Type: 2-Piece BaseModel: AB3 Two-Piece Weaver-Style Scope BasesStyle: WeaverFinish: MatteMaterial: Aircraft Grade AluminumPieces: 2Gun Type: RifleMount Type: To ReceiverRings Included: No