Magpul SGA Shotgun Stock - Orange Synthetic for Mossberg 500/590/590A1, Ambidextrous (MAG490-ORG)

The Magpul SGA shotgun stock is a purpose-built upgrade for Mossberg 500, 590, and 590A1 12-gauge shotguns that replaces the factory buttstock with a modular, user-adjustable platform. If your pump shotgun came from the factory with a fixed, uncomfortable cheek weld and no way to dial in your length of pull, this ambidextrous stock solves both problems with Magpul's proven design approach—giving you real adjustability instead of making do with what came in the box.

The SGA uses a spacer system to let you set your length of pull in half-inch increments, adjusting from roughly 12.3 inches to 14.3 inches to fit your frame and shooting style. That matters whether you're running it in a duty setup, hunting upland game, or training at the range. The recoil-reducing butt-pad keeps the gun manageable during extended practice or rough conditions, and integral sling loops on both sides give you mounting points for quick-detach slings without drilling into the stock. The bright orange finish (or choose black, Flat Dark Earth, or Stealth Gray) stays visible in the field and makes your gear easy to spot in a truck bed or blind.

Built in the USA, the SGA accepts optional cheek risers if you add an optic or raised sight later, so your investment in the stock doesn't lock you into a single configuration. It's the kind of straightforward upgrade that Mossberg shooters have asked for—genuine adjustability from a brand that understands how shotguns actually get used.

Key Features

• Spacer-adjustable length of pull from approximately 12.3 to 14.3 inches in 1/2-inch increments
• Recoil-reducing butt-pad for comfort under sustained fire
• Ambidextrous integral sling loops (1.25 inches) on each side
• Compatible with optional cheek risers for optics and raised sights
• Made in the USA
• Available in orange, black, Flat Dark Earth, and Stealth Gray

Specifications

Frequently Asked Questions

Will the Magpul SGA stock fit my Mossberg shotgun?

Yes, the SGA is designed for Mossberg 500, 590, and 590A1 12-gauge shotguns. It mounts directly to the receiver in place of the factory buttstock.

Can I adjust the length of pull?

Yes. The SGA uses spacers to adjust length of pull in 1/2-inch increments, allowing you to set your pull length from approximately 12.3 inches to 14.3 inches to match your build and shooting position.

Does the orange finish come with any downsides?

The bright orange makes your shotgun visible in low light and easy to spot in a vehicle or blind. If you prefer a more subdued color, the SGA is also available in black, Flat Dark Earth, and Stealth Gray.

Can I add optics support later with this stock?

The SGA is designed to accept optional cheek risers, so you can upgrade your sight picture after purchase if you add an optic or raised rear sight to your shotgun.