The Weaver Extended Multi-Slot Base, Savage Axis I/II, 8-40 Post-June 2021 (Weaver part no. 99610) is an extended multi-slot scope base for the Savage Axis I and II with 8-40 screws, post-June 2021 production. It is machined from aircraft-grade 6061-T6 aluminum and finished in Type-III hard coat anodizing, a combination built for strength and durability under recoil. The base adds an extra inch of forward length for mounting flexibility, and its multi-slot top accepts both Picatinny and Weaver-style rings. Weaver builds it in the USA, which suits a hunting or range rifle that needs a dependable optic platform.

Key Specifications

• It is made for the Savage Axis I and II with 8-40 screws, post-June 2021 production, the fit Weaver lists for this part number.
• The extended design adds an extra inch of forward length, which gives you more room to position the scope.
• It uses 8-40 base screws, the thread size on post-June 2021 Axis receivers.
• Construction is aircraft-grade 6061-T6 aluminum, a strong, lightweight alloy that stands up to repeated recoil.
• The finish is Type-III hard coat anodizing, chosen for durability on a base that carries the optic through every shot.
• The multi-slot top accepts Picatinny and Weaver-style rings, so you can choose rings by diameter and height.
• It is made in the USA by Weaver, with the fit and finish expected from a long-established optics-mount maker.
• Base screws follow Weaver’s torque guidance of 15 inch-pounds for 6-48 screws and 18 inch-pounds for 8-40 screws, so a correct torque wrench setting keeps the base from shifting.

Frequently Asked Questions

How is an extended base different from a standard multi-slot base? The extended version adds an extra inch of forward length, which gives more flexibility in where the optic sits.

Which rifles does this base fit? Weaver lists it for the Savage Axis I and II with 8-40 screws, post-June 2021 production.

What torque should I use on the base screws? Weaver recommends 15 inch-pounds on 6-48 base screws and 18 inch-pounds on 8-40 base screws, so use the figure that matches the screws your rifle takes.

Buy the Weaver Extended Multi-Slot Base, Savage Axis I/II, 8-40 Post-June 2021

Fit this base to your rifle, add rings that match your scope tube, and finish the mount with parts from our scope bases lineup and the full Weaver catalog. Order from our Lubbock, Texas gun shop for fast shipping.