The EGW Scope Base (brand part number 45310) is a Picatinny rail base machined specifically for late-manufacture (post-1997) Mossberg 500, 590, 835, 930, and 935 shotguns. EGW machines the base from 6061-T6 extruded aluminum and finishes it in matte black, giving Mossberg owners a modern optics-mounting platform the factory receiver doesn’t offer. Installation uses the included hex head screws and wrench, and EGW recommends 20 inch-pounds of torque with a drop of blue thread locker for a secure, properly seated mount. Made in the USA, it’s a direct, no-drilling upgrade for anyone mounting a red dot or scope on one of these Mossberg shotguns.

Key Specifications

• Machined from 6061-T6 extruded aluminum and finished in matte black.
• Purpose-built for late (post-1997) Mossberg 500, 590, 835, 930, and 935 shotguns.
• Center spread between mounting holes measures 2.125 inches.
• Overall base length measures 5.882 inches.
• Includes hex head mounting screws and a wrench.
• EGW recommends 20 inch-pounds of torque and blue thread locker for installation.
• Cut to the MIL-STD 1913 Picatinny rail pattern.
• Requires Picatinny-pattern rings to mount an optic.
• Rings are not included and must be purchased separately.
• Made in the USA.

Frequently Asked Questions

Which Mossberg shotguns does this fit? Late (post-1997) production Mossberg 500, 590, 835, 930, and 935 models.

What’s included for installation? Hex head mounting screws and a wrench; EGW recommends 20 inch-pounds of torque with blue thread locker.

Are scope rings included? No, Picatinny-pattern rings are sold separately.

Buy the EGW Picatinny Scope Base for Mossberg 500/590/835/930/935

Mount a red dot or scope on your Mossberg pump without drilling or gunsmithing. Order it from our Egw lineup, part of our scope accessories and parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.