The Weaver #402S Top-Mount Scope Base (Weaver part no. 48430) is machined for the High Standard, Marlin 455, and Marlin MR7, giving these bolt rifles a factory-tight platform for a riflescope. Weaver cuts the base from aluminum and finishes it in a silver matte that matches stainless and nickel-finished receivers. Because it’s machined to the exact screw pattern of these rifles, it bolts straight to the factory holes with no drilling or gunsmithing needed. This is the correct base to start with if you’re mounting glass on a Marlin 455, Marlin MR7, or High Standard rifle.

Key Specifications

• Purpose-built to fit the High Standard, matching the receiver’s factory-drilled screw pattern.
• Also fits the Marlin 455 and Marlin MR7, sharing the same drilled hole pattern.
• Listed as a 1-piece base, so a single component bridges the full mounting area.
• Uses Weaver’s To Receiver mount style, bolting directly to the factory tapped holes.
• Finished in silver matte to complement stainless or nickel receivers.
• Machined from aluminum for a lightweight, corrosion-resistant base.
• Requires Weaver-style rings to complete the mount.
• Ships with rings not included, so pair it with your own Weaver-style rings.
• Cross-references as Weaver Application #402S on the brand’s official fit chart.
• Ships at a featherlight 0.05 lb, adding almost nothing to your order.

Frequently Asked Questions

What rifles does this base fit? It’s machined for the High Standard, Marlin 455, and Marlin MR7, listed under Weaver’s Application #402S.

Are scope rings included? No, this is the base only; pair it with a set of Weaver-style rings to finish the mount.

Why choose the silver finish over black? The silver matte finish is meant to match stainless or nickel-finished receivers rather than a blued one.

Buy the Weaver #402S Top-Mount Scope Base for High Standard, Marlin 455, and Marlin MR7

A base machined to the exact receiver pattern keeps a scope tracking true shot after shot, and this Weaver #402S bolts straight to a Marlin 455, Marlin MR7, or High Standard rifle with no modification. Order it from our Lubbock, Texas gun shop and it ships fast to your door, along with more scope bases and mounting hardware.