The Weaver #88 Top-Mount Scope Base (Weaver part no. 48088) is machined specifically for the Mossberg 500AS and 600 pump shotguns, giving these receivers a solid, factory-tight platform for a scope or red dot. Weaver CNC-machines each base from aluminum to hold its geometry under recoil and finishes it in a black gloss that matches most factory blued shotgun receivers. Because it’s cut to the exact screw pattern of the 500AS/600 receiver, there’s no drilling or gunsmithing involved — it bolts straight to the factory holes.

Key Specifications

• Purpose-built to fit the Mossberg 500AS and 600 pump shotgun receivers.
• Listed as a 1-piece base, so a single component spans the mounting area.
• Uses Weaver’s To Receiver mount style, bolting directly to the factory tapped holes.
• Machined from aluminum for a light, corrosion-resistant base.
• Finished in black gloss to match most factory blued shotgun receivers.
• Requires Weaver-style rings to complete the mount.
• Ships with rings not included, so pair it with your own Weaver-style rings.
• CNC-machined to tight tolerances for a custom, drop-in fit on the receiver.
• Ships at a featherlight 0.2 lb, adding almost nothing to your order.

Frequently Asked Questions

What shotguns does this base fit? The Mossberg 500AS and 600 pump-action shotguns.

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

What finish does it come in? Black gloss, to match a factory blued shotgun receiver.

Buy the Weaver #88 Top-Mount Scope Base

A correctly fitted base is the difference between an optic that holds zero and one that walks under recoil, and this Weaver #88 is machined to bolt straight to your Mossberg 500AS or 600 with no modification. Order it from our Lubbock, Texas gun shop and it ships fast, along with more scope bases and mounting hardware.