Weaver 48109 (#401) Top Mount Aluminum Scope Base — Gloss Black

The Weaver #401 (48109) is a one-piece, top-mount scope base machined for a secure fit on factory-drilled Smith & Wesson and Taurus revolver frames. Constructed from high-strength aluminum with a gloss black finish, it provides a stable platform for Weaver-style rings. This base installs to factory-drilled and tapped revolver receivers and requires removal of the rear sight for installation.

Key Specifications

• The finish is BLACK GLOSS for a classic appearance.
• The material is ALUMINUM for a balance of strength and light weight.
• The product is a 1-Piece Base designed as a top mount.
• Compatibility is listed as S&W FACTORY DRILLED REVOLVERS in provided data.
• The type of rings required is WEAVER STYLE; rings are not included.
• The listed dimensions are 0.55 X 3.25 X 6.50 (as provided).
• The listed height is 0.5500 (as provided).
• The listed width is 3.2500 (as provided).
• The listed length is 6.5000 (as provided).
• The listed weight is 0.12 (as provided).

This solid one-piece base delivers a reliable platform for mounting optics on compatible factory-drilled Smith & Wesson and Taurus revolvers. Precision machining and a proven Weaver-style cross-lock design offer repeatable ring alignment and secure attachment for target, hunting, or general-purpose optics setups. Its straightforward, durable construction makes it a practical choice for shooters looking to add a stable optic mounting solution without unnecessary complexity.