Weaver style mounts for Encore pistols or rifles will lock securely to any weaver style base allowing quick removal and reinstallation of scope while maintaining the rifles zero. For 1 tubes only. Weaver Style System 1 is a 2 piece base for modern style inline models that mounts directly to the receiver of the rifle. Specifications Type : 1-Piece Base MFG/Model : Encore Style : 1-Piece Misc : Accepts Weaver Style Rings Finish : Blue