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Mossberg
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.
| Gauge | 12 Gauge |
| Action Type | Semi-Automatic |
| Chamber Size | 3 inch |
| Barrel Length | 14.375 inches |
| Barrel Finish | Matte Blue |
| Overall Length | 33 inches |
| Magazine Capacity | 5+1 (5-round magazine plus 1 in chamber) |
| Length of Pull | 12–14 inches (adjustable) |
| Choke | Accu-Choke System—Cylinder Bore installed |
| Sights | Metal Ghost Ring (rear) with Front Fiber Optic; Optic-Ready |
| Stock | Magpul SGA Adjustable with Spacers and QD Ports |
| Weight | 7.35 lbs |
| Receiver | Drilled and Tapped; Optic-Ready (Shield RMSc Footprint) |
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.
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.
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.
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.
Mossberg
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.
| Gauge | 12 Gauge |
| Action Type | Semi-Automatic |
| Chamber Size | 3 inch |
| Barrel Length | 14.375 inches |
| Barrel Finish | Matte Blue |
| Overall Length | 33 inches |
| Magazine Capacity | 5+1 (5-round magazine plus 1 in chamber) |
| Length of Pull | 12–14 inches (adjustable) |
| Choke | Accu-Choke System—Cylinder Bore installed |
| Sights | Metal Ghost Ring (rear) with Front Fiber Optic; Optic-Ready |
| Stock | Magpul SGA Adjustable with Spacers and QD Ports |
| Weight | 7.35 lbs |
| Receiver | Drilled and Tapped; Optic-Ready (Shield RMSc Footprint) |
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.
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.
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.
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.
