Weaver Top Mount Scope Base #63B 1-Piece, Gloss Black

This Weaver 1-piece top-mount scope base (#63B) is machined from aluminum alloy and finished in gloss black for a clean, protective surface. Designed to interface with Weaver-style rings, it mounts to the receiver to provide a secure attachment point for optics. The base is sold as a single-piece unit and is described as compatible with a range of Marlin and selected Mossberg/Western Field receivers.

Key Specifications

• The material is aluminum alloy for a balance of strength and weight.
• The finish is black gloss for corrosion resistance and visual consistency.
• This product is a 1-piece top-mount base.
• The model number is 63B.
• The listed dimension is 0.60 x 3.35 x 8.05 (inches as provided).
• The listed height is 0.6000 (as provided).
• The listed width is 3.3500 (as provided).
• The listed length is 8.0500 (as provided).
• Rings included: No.
• Type of rings needed: Weaver style.

Built to Weaver's machining tolerances, the #63B one-piece base provides a stable, low-profile platform for Weaver-style rings. Its single-piece design reduces alignment variables and offers simple installation to the receiver. For shooters fitting optics to compatible Marlin and select Mossberg/Western Field models, this base supplies a straightforward mounting solution without included rings.