The EGW Mossberg 500, 590, 835, 930, 935 scope base is a no-gunsmithing solution for adding an optic-ready Picatinny rail to your shotgun receiver. Engineered for post-1997 Mossberg pump and semi-auto models, this one-piece mount bolts directly to your factory scope mount holes—no drilling, no tapping, no trips to a gunsmith. Whether you're setting up a turkey gun, a defensive shotgun, or a clay target platform, the ability to mount a red dot, reflex sight, or scope without permanent modification gives you real flexibility in how you configure your gun.
Built from 6061 T6 extruded aluminum and precision-machined to MIL-STD 1913 Picatinny specs, the base accommodates any standard Picatinny or Weaver scope ring. The milled center channel reduces weight without sacrificing rigidity—a thoughtful detail for hunters and competitors who carry their gun all day. Full-width cross-slots are gauged to plus-or-minus 0.002 inches, so your rings won't shift, and you can adjust eye relief quickly if you swap optics.
Installation is straightforward: the base uses socket head Torx screws (both #6 and #8 are included, along with the wrench) and threads into the existing holes on your Mossberg receiver. EGW recommends 20 inch-pounds of torque and a drop of blue Loctite to keep everything locked in place. Once mounted, you'll have the same rapid-adjustment and ring-swap convenience on your shotgun that AR and rifle shooters take for granted.
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