The silver Top Mount Base #63BS from Weaver has been machined to tight tolerances for a custom fit. This aluminum base offers maximum strength so that the rings will hold tight.
Compatibility
One-Piece Base for:
Marlin 45, 30AS, 336, 444, 1894, 1895, Camp 9, 308, 338
Westernfield 740
UPC: 076683484475