Weaver #417M Top Mount Base, Matte Black — Mossberg 500/590/835

The Weaver #417M one-piece top-mount scope base is a machined aluminum mount designed to provide a rigid, repeatable platform for optics on compatible Mossberg shotguns. Finished in black matte, the base is machined to tight tolerances for a secure fit and reliable ring retention. It is configured as a top mount that attaches to the receiver and requires Weaver-style rings.

Key Specifications

• The model designation is #417M (Weaver 48440).
• Compatibility includes Mossberg 500 (1997+), 590 and 835.
• Construction material is Aluminum.
• Finish is Black matte.
• Configuration is a one-piece top mount (to receiver).
• Overall dimensions are 0.60 x 3.25 x 5.00 inches.
• Height measures 0.6000 inches.
• Rings are not included with the base.
• Required ring type is Weaver-style rings.

Engineered for stability and repeatable zero, the Weaver 417M base offers a stout, single-piece mounting solution for shooters fitting optics to Mossberg 500-series shotguns. Its precision machining and aluminum construction deliver a dependable foundation for a range of sighting systems and shooting applications.