The Weaver #90 Top Mount Scope Base (brand part no. 48090) is a black gloss, one-piece aluminum base machined specifically to fit the Marlin 39A. Weaver machines every #90 base to tight tolerances for a custom fit, so it seats consistently on the receiver without the rocking or play a loose base can introduce. The mount is built to Weaver’s own ring standard and designed for maximum clamping strength, keeping your rings and scope locked in place under repeated recoil. It does not include rings, so you will need Weaver-style rings sized for your scope tube to complete the mount.

Key Specifications

• #90 Application is machined specifically for the Marlin 39A.
• One-Piece Top Mount design simplifies alignment versus a two-piece base.
• Aluminum Construction keeps the base lightweight yet rigid.
• Black Gloss Finish matches most factory rifle finishes.
• Tight-Tolerance Machining gives a consistent, custom fit on the receiver.
• Weaver-Style Rings Required since rings are not included with the base.

Frequently Asked Questions

What rifle does this base fit? The Marlin 39A.

Does it come with rings? No, Weaver-style rings sized for your scope are needed separately.

What is it made of? Aluminum with a black gloss finish.

Buy the Weaver #90 Top Mount Scope Base

Mount a scope on your Marlin 39A with the Weaver #90 Top Mount Scope Base from our scope bases selection. Order online and we will ship it straight to your door from our Lubbock, Texas gun shop.