Mossberg 940 SPX Shotgun 12ga 3" Chamber 7rd Magazine 18.5'' Barrel Black Ghost Ring Sight

The Mossberg 940 SPX is a semi-automatic 12-gauge shotgun purpose-built for tactical applications and home defense. Chambered for 3-inch shells with a 7-round capacity and 18.5-inch barrel, this tactical autoloader combines speed, reliability, and shootability in a platform that handles modern optics and carries ammunition efficiently. The 940 SPX takes everything that makes the 940 Pro platform run and adds serious ergonomic and mounting upgrades—features that working shooters and home defenders actually need rather than marketing fluff.

What sets the 940 SPX apart is its forward-thinking optics integration. The receiver is drilled and tapped, and the shotgun ships optic-ready with multiple adapter plates in the box—you can mount RMSc, RMR, Docter, or Leupold footprint optics without hunting for aftermarket solutions. The 18.5-inch barrel keeps the gun compact for tight spaces while the metal ghost ring sights with front fiber optic element offer a proven backup sight picture when you need it. The sights are fast, reliable, and visible in low light—exactly what matters when seconds count.

The forend is the real workhorse here: it features an integrated heat shield to keep your hand safe during sustained fire, M-Lok slots for mounting lights, lasers, or other gear, and QD ports that match the adjustable-length stock. The Vang Comp 6-shotshell carrier system keeps reload ammunition exactly where you need it. Mossberg's gas-vent system keeps the gun running clean across a wide range of loads. An oversized safety and bolt release make the controls fast and reliable even when gloved or under stress. The synthetic stock adjusts from 12.5 to 14.25 inches—you can dial in length of pull for your body and shooting style—and includes QD ports so you can secure a sling or other gear.

This is a semi-auto shotgun that respects the shooter's time and money by shipping feature-complete and ready to customize rather than requiring a parts list and a trip to the bench.

Key Features

• Optic-ready receiver drilled and tapped with multiple adapter plates for RMSc, RMR, Docter, and Leupold footprint optics
• Metal ghost ring sights with front fiber optic element for fast, low-light target acquisition
• Integrated heat shield on forend—protects your hand during sustained fire
• M-Lok accessory slots and QD ports on forend for lights, lasers, slings, and other tactical gear
• Vang Comp 6-shotshell carrier system for quick ammunition access
• Gas-vent system designed for reliable cycling across a range of loads
• Oversized safety and bolt release for positive control and fast manipulation
• Adjustable length of pull stock (12.5–14.25 inches) with QD ports
• 7+1 capacity—7 rounds in the magazine plus one in the chamber

Specifications

Frequently Asked Questions

What optics can I mount on the 940 SPX?

The 940 SPX ships with adapter plates for RMSc, RMR, Docter, and Leupold footprint optics. The receiver is drilled and tapped, so you can mount any of these patterns directly. If your preferred red dot uses one of these footprints, you're ready out of the box.

Is the 940 SPX good for home defense?

Yes. The 18.5-inch barrel keeps the gun compact for moving through tight spaces, the 7-round capacity provides firepower, the gas system is reliable, and the controls are intuitive even under stress. The ghost ring sights with fiber optic front element and optional optics mounting give you flexible aiming options in low light.

Can I adjust the stock to fit my frame?

Yes. The synthetic stock features adjustable length of pull ranging from 12.5 to 14.25 inches, so you can dial in the fit for your body and shooting style.

What choke comes installed?

The 940 SPX ships with a Cylinder Bore choke installed. The Accu-Choke system allows you to swap chokes to match different loads and patterns if needed.