Egw Mossberg 500, 590, 835, 930, 935 Post-1997

The EGW Mossberg 500, 590, 835, 930, 935 post-1997 scope base lets you add an optic to your shotgun without gunsmithing. This one-piece Picatinny rail mounts directly to your receiver using the factory scope mount holes—no drilling, no tapping, no trips to the gunsmith. Whether you're setting up a deer gun, a tactical platform, or a long-range slug shooter, a solid scope base is where accuracy starts.

Built from 7075 T6 extruded aluminum and machined to MIL-STD 1913 Picatinny specs, this base is rigid enough to hold zero through hard use. The heavy-duty profile sits 0.100" lower than standard mounts, keeping your optic closer to the barrel centerline for better sight picture and less height-over-bore. Full-width cross-slots are gauged to +/−0.002" for fast, repeatable ring adjustments and simple eye relief changes. Works with any Picatinny or Weaver scope rings, giving you flexibility in your optic choice.

Installation is straightforward: the base drops onto your Mossberg's receiver, aligns with the existing holes, and you're ready to mount rings and glass. EGW includes socket head Torx screws and a wrench; they recommend 20 inch-pounds of torque and a drop of blue Loctite for a permanent, vibration-proof fit. This is the kind of foundation that turns a shotgun into a real precision tool.

Key Features

• One-piece Picatinny rail—no drilling or tapping required
• Mounts directly to factory scope holes on Mossberg receiver
• 7075 T6 aluminum for rigidity and durability
• Heavy-duty profile positions optic 0.100" lower for improved sight picture and accuracy
• MIL-STD 1913 Picatinny slots gauged to +/−0.002" for precise ring adjustment
• Accepts any Picatinny or Weaver scope rings
• Includes socket head Torx screws and wrench

Specifications

Frequently Asked Questions

Will this mount fit my Mossberg shotgun without drilling?

Yes. The EGW base is drilled to align with the factory scope mount holes on Mossberg 500, 590, 835, 930, and 935 receivers (post-1997 models). Drop it on, bolt it down—no gunsmithing needed.

What scope rings can I use with this base?

This base accepts any Picatinny or Weaver scope rings, so you have plenty of options in terms of brand and ring style to match your optic and budget.

How much lower does the heavy-duty version sit compared to other mounts?

The heavy-duty profile positions your optic 0.100" lower than the lightweight variant, keeping your scope closer to the barrel centerline for a better sight picture and improved accuracy.

What's included with this mount?

The base comes with socket head Torx screws and a wrench. EGW recommends using 20 inch-pounds of torque and a drop of blue Loctite when installing to ensure a solid, vibration-proof fit.