Mossberg 990 SPX 12 Gauge Semi-Auto Shotgun – Magpul SGA, Optic Ready, 18.5" Barrel (83009)

Mossberg 990 SPX 12 Gauge Semi-Auto Shotgun – Magpul SGA, Optic Ready, 18.5" Barrel (MFR 83009)

• California Roster Certified For Sale

The Mossberg 990 SPX is a modern tactical semi-automatic 12 gauge shotgun engineered for reliability, speed, and modularity. Built on a proven gas-operated system, this platform combines smooth cycling performance with premium defensive features, making it ideal for home defense, duty use, and tactical applications. With a factory-installed Magpul SGA stock, M-LOK compatible forend, and an optics-ready receiver, the 990 SPX is purpose-built for adaptability in any scenario.

Performance-Driven Semi-Auto Platform

Designed around a durable gas piston operating system, the 990 SPX delivers reduced recoil impulse and consistent cycling across a wide range of 2 ¾" and 3" 12 gauge loads. Corrosion-resistant internals and refined feeding geometry ensure smooth operation even under demanding conditions.

• Gas-operated semi-automatic action for reduced recoil
• Enlarged and beveled loading port for faster reloads
• Elongated elevator for improved feeding reliability
• Anodized follower for enhanced visibility and durability

Tactical Configuration with Magpul SGA Stock

Outfitted with a Magpul SGA adjustable stock, the 990 SPX allows incremental length-of-pull adjustment for improved ergonomics and shooter fit. Integrated QD sling attachment points enhance carry flexibility in defensive or training environments.

• Adjustable length-of-pull via spacer system
• Ergonomic pistol grip angle for improved control
• Integrated QD sling attachment points

Optics-Ready & Mission Flexible

The drilled and tapped receiver is optics-ready and ships with multiple adapter plates, allowing direct mounting of popular red dot footprints. This flexibility allows users to configure the shotgun for close-quarters speed or precision targeting.

• Direct mount Shield RMSc footprint capability
• Includes adapter plates for RMR®, Docter™, and Leupold® footprints
• Factory ghost ring rear sight plate with fiber optic front sight

M-LOK Forend with Integrated Heat Shield

The tactical forend features M-LOK slots and an integrated heat shield for improved handling during extended firing sessions. Multiple mounting points allow attachment of lights, lasers, and other mission-critical accessories.

• M-LOK compatible accessory slots
• Integrated heat shield for barrel protection
• QD sling ports for modular setup

Key Features

• 18.5" matte black barrel with cylinder bore choke
• 7+1 capacity (3" shells)
• Ambidextrous thumb safety
• Paddle-style bolt release and oversized controls
• Gas piston operating system
• Magpul SGA adjustable stock
• Drilled and tapped receiver with optic plates included

Specifications

• Manufacturer: Mossberg
• MFR #: 83009
• UPC: 015813830096
• Gauge: 12 Gauge
• Action: Semi-Automatic
• Barrel Length: 18.5"
• Capacity: 7+1
• Chamber: 3"
• Finish: Matte Black
• Stock: Magpul SGA Synthetic Adjustable
• Weight: 6.04 lbs
• Operating System: Gas Piston
• Sights: Fiber Optic Front / Ghost Ring Rear Plate
• Receiver: Drilled & Tapped, Optics Ready

Important Notes

Ensure compliance with all federal, state, and local laws prior to purchase. Magazine capacity restrictions may apply depending on jurisdiction. Firearm must ship to a licensed FFL dealer.

Why Choose the 990 SPX

The Mossberg 990 SPX delivers a rare combination of semi-auto speed, modular tactical design, and factory-ready optic integration. Whether configured for home defense or professional use, this platform provides dependable performance with modern customization options straight from the factory.

FAQ

Is the Mossberg 990 SPX optics ready out of the box?

Yes. The receiver is drilled, tapped, and includes multiple adapter plates for RMSc, RMR, Docter, and Leupold footprints.

What type of action does the 990 SPX use?

It uses a gas-operated semi-automatic system designed to reduce recoil and improve cycling reliability.

Can I mount accessories on the forend?

Yes. The M-LOK compatible forend allows attachment of lights, lasers, and other accessories.

What is the capacity of this shotgun?

The 990 SPX has a 7+1 capacity using 3" 12 gauge shells.

Does it support sling attachment?

Yes. The stock and forend include QD sling attachment points for flexible carry options.

What sights come standard?

It includes a fiber optic front sight and a ghost ring rear sight plate for rapid target acquisition.

Is this shotgun suitable for home defense?

Yes. Its semi-auto action, reduced recoil system, and compact 18.5" barrel make it well-suited for defensive use.