Weaver 99474 Extended Multi-Slot Picatinny Base — Mossberg

The Weaver 1-piece extended multi-slot base expands scope mounting options on compatible rifles by adding forward rail length. It mounts to the receiver and accepts Weaver- or Picatinny-style rings. The base is finished in a black matte, Type III hard coat anodized surface and includes an integral recoil lug and Torx-style fasteners designed to resist slipping and stripping.

Key Specifications

• Brand is Weaver.
• Model number is listed as 99474.
• Designed to fit Mossberg Patriot Long Action rifles.
• Finish is black matte, Type III hard coat anodized.
• Provides an additional 1 inch of forward length for more mounting options.
• Compatible with Weaver or Picatinny-style rings.
• Includes an integral recoil lug for secure positioning.
• Secures with no slip / no strip Torx screws.
• Listed dimensions in manufacturer data are 1.05 x 3.80 x 10.0.
• Sold as a 1-piece base for receiver mounting.

This extended multi-slot base is built to increase flexibility in optic placement while maintaining a low-profile attachment to the receiver. Its extended rail and anti-slip fasteners support a variety of ring and optic choices, making it a practical upgrade for shooters who need additional forward mounting room without adding unnecessary complexity. The result is a dependable platform for optics on compatible Mossberg Patriot long action rifles.