Mossberg 940 Pro Tactical SPX Shotgun Review

Published on February 28, 2026
Duration: 24:45

This guide details the disassembly and reassembly process for the Mossberg 940 Pro SPX tactical shotgun. It covers removing the trigger housing, barrel, bolt, and gas system components, highlighting the self-cleaning gas piston system and nickel boron coatings. Proper reassembly ensures the firearm functions correctly and safely.

Quick Summary

The Mossberg 940 Pro SPX tactical shotgun boasts a self-cleaning gas piston system with nickel boron coated internals for smooth operation and reduced recoil. It features enlarged controls, an 18.5-inch barrel, 7+1 capacity, and is optics-ready with direct mounting for RMSC footprint red dots, plus included adapter plates.

Frequently Asked Questions

What are the key features of the Mossberg 940 Pro SPX tactical shotgun?

The Mossberg 940 Pro SPX features a self-cleaning gas piston system, nickel boron coated internal parts, enlarged controls (bolt release, charging handle, safety), an 18.5-inch barrel, 7+1 capacity, ghost ring sights with a removable plate for red dot mounting, and M-LOK attachment points.

How is the recoil managed on the Mossberg 940 Pro SPX?

Recoil is managed by an efficient gas piston system that vents excess gas, reducing felt recoil. This system is designed to be smooth-shooting, even with potent 3-inch magnum loads, and contributes to reliability.

Can the Mossberg 940 Pro SPX accommodate different optics?

Yes, the 940 Pro SPX is optics-ready. It features a removable sight plate that allows for direct mounting of RMSC footprint red dots. Adapter plates for RMR, Leupold Delta Point, and Docter footprints are also included.

What are the disassembly and reassembly steps for the Mossberg 940 Pro SPX?

Disassembly involves removing trigger housing pins, then the trigger group, barrel, bolt handle, bolt, and gas system components. Reassembly reverses these steps, ensuring the return spring is correctly seated and all parts align properly for safe function.

What is the typical trigger pull weight for the Mossberg 940 Pro SPX?

The trigger pull weight for the Mossberg 940 Pro SPX was measured at approximately 4 pounds 5.6 ounces. It features a distinct wall and a clean break, making it suitable for tactical applications.

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