This Weaver Top Mount Base, application #45 (Weaver part no. 48045), is a 1-piece top mount base machined from aluminum for the Browning A-Bolt/Marlin 455. Weaver finishes it in black gloss and machines it to tight tolerances so it seats flush and true against the receiver, giving a solid foundation for Weaver-style scope rings. It mounts using the rifle’s existing factory screw holes, so there’s no drilling or permanent modification needed. For shooters running a Browning A-Bolt/Marlin 455 that came from the factory without an optics rail, this base is the direct path to mounting glass.

Key Specifications

• Machined specifically for the Browning A-Bolt/Marlin 455, listed as Weaver application #45.
• Built as a 1-piece top mount base, matching that mounting style to the receiver.
• Machined from Aluminum for a durable, corrosion-resistant base.
• Finished in Black Gloss to match most factory barreled actions.
• Mounts directly to the receiver using the rifle’s factory screw holes.
• Cut to accept Weaver-style scope rings, which are sold separately.
• Machined to tight tolerances for a custom, repeatable fit against the receiver.
• Cut for maximum ring contact area, so rings clamp down securely under recoil.
• Ships at a light 0.05 lb, adding almost nothing to your order.

Frequently Asked Questions

Will this work on other rifles besides the Browning A-Bolt/Marlin 455? No, Weaver machines each application number to one specific receiver pattern; this is application #45, built for the Browning A-Bolt/Marlin 455.

Are scope rings included? No, this is the base only; pick up a set of Weaver-style rings separately to complete the mount.

Is installation difficult? No, the base uses the rifle’s existing factory screw holes, so it’s a direct bolt-on installation.

Buy the Weaver Top Mount Base #45, Browning A-Bolt/Marlin 455, Black Gloss

Getting glass onto a Browning A-Bolt/Marlin 455 starts with a solid base, and Weaver machines this one to seat true and hold zero under recoil. Order it from our Weaver lineup, part of our full selection of scope bases, from our Lubbock, Texas gun shop, and it ships fast to your door.