Mossberg M990 Magpul Sga 12Ga 14.375 Blk 5Rd

The Mossberg M990 Magpul SGA is a 12-gauge semi-auto shotgun built for shooters who want tactical versatility without compromise. With a 14.375-inch barrel and compact 33-inch overall length, this short-barrel shotgun delivers semi-automatic reliability in a platform that handles close-quarters work, home defense, or sport shooting. The gas-vent system and corrosion-resistant internals—including an enlarged loading port and smooth-operating elevator—keep the gun running reliably shot after shot, while the Magpul SGA adjustable stock and included spacers let you dial in length of pull from 12 to 14 inches for your ideal fit.

What sets the M990 apart is its modern accessory integration. The optic-ready receiver comes drilled and tapped with a Shield RMSc footprint cut, plus three additional adapter plates to mount RMR, Docter, or Leupold footprint micro dots. Metal ghost ring sights with a front fiber optic sight come standard, giving you fast, reliable aiming right out of the box. The tactical forend features integrated M-Lok slots and QD ports, so you can mount lights, grips, and other gear exactly where you need it—and a heat shield protects your hands during extended use.

Built for shooters who demand both performance and flexibility, the M990 Magpul SGA balances combat-grade ergonomics with intuitive controls: an oversized safety and bolt release make operation smooth under stress. The 5+1 capacity (5-round magazine plus 1 in the chamber) and 3-inch chamber handle a full range of 12-gauge loads. At 7.35 pounds, it's lightweight enough for extended handling yet substantial enough to manage recoil.

Key Features

• Semi-automatic gas-vent system for reliable cycling and low maintenance
• Optic-ready receiver with RMSc footprint cut and three universal adapter plates included
• Magpul SGA adjustable stock with spacers—12-inch to 14-inch length of pull
• Tactical forend with integrated M-Lok accessory slots, QD ports, and heat shield
• Metal ghost ring sights with front fiber optic sight for fast target acquisition
• Oversized safety and bolt release for positive control and quick manipulation
• Accu-Choke system with cylinder bore choke installed
• Corrosion-resistant internals and matte blue barrel finish

Specifications

Frequently Asked Questions

What optics can I mount on the M990 Magpul SGA?

The receiver is cut for Shield RMSc footprint red dots and comes with three additional adapter plates to accommodate RMR, Docter, and Leupold footprint optics. You can also use the included metal ghost ring sights with fiber optic front sight for fast aiming without an electronic optic.

Is the stock adjustable, and does it come with spacers?

Yes. The Magpul SGA adjustable stock is fully adjustable from 12 to 14 inches in length of pull. Spacers are included to help you dial in the perfect fit.

What choke comes installed?

The M990 comes with an Accu-Choke System featuring a cylinder bore choke installed. You can swap chokes to match your load and shooting application.

Can I add accessories like lights or fore-grips to this shotgun?

Yes. The tactical forend features M-Lok accessory slots and quick-detach (QD) ports, so you can easily mount lights, grips, and other tactical accessories where you need them.