Mossberg 990 Aftershock SPX 12 Gauge

Published on January 16, 2026
Duration: 0:42

This guide details the operation and optic mounting for the Mossberg 940 Pro Aftershock SPX 12 Gauge shotgun. It covers retrieving the firearm from storage, understanding its gas-operated action, and utilizing the bird's head grip. The process of mounting an optic like the Holosun EPS Carry to the receiver's Shield RMSc footprint is highlighted, emphasizing the firearm's optic-ready capability. The guide concludes with a reminder of the available color variants and essential safety precautions.

Quick Summary

The Mossberg 940 Pro Aftershock SPX is a 12 Gauge, gas-operated semi-automatic shotgun featuring a unique bird's head grip and an optic-ready receiver compatible with Shield RMSc footprint sights like the Holosun EPS Carry. It is available in Black, FDE, and OD Green, offering versatility for tactical applications and personal defense.

Chapters

  1. 00:00Product Introduction
  2. 00:05Live Fire Demonstration
  3. 00:15Optic Integration
  4. 00:25Performance and Handling
  5. 00:35Color Variants and Branding

Frequently Asked Questions

How do you mount an optic on the Mossberg 940 Pro Aftershock SPX?

The Mossberg 940 Pro Aftershock SPX features an optic-ready receiver with a Shield RMSc footprint. You can directly mount compatible micro red dot sights, like the Holosun EPS Carry, to the milled slide. Ensure proper torque specifications are followed for secure mounting.

What are the key features of the Mossberg 940 Pro Aftershock SPX?

This 12 Gauge shotgun is gas-operated and semi-automatic, featuring a bird's head grip for unique handling. It boasts an optic-ready receiver and is available in Black, FDE, and OD Green finishes, making it adaptable for various users and applications.

What type of grip does the Mossberg 940 Pro Aftershock SPX use?

The Mossberg 940 Pro Aftershock SPX utilizes a distinctive bird's head grip. This grip style offers a compact and rounded profile, providing a different ergonomic feel compared to traditional pistol grips, and is demonstrated for specific shooting techniques.

What ammunition was shown with the Mossberg 940 Pro Aftershock SPX?

The video visually introduces the Mossberg 940 Pro Aftershock SPX alongside Winchester Universal 12 Gauge ammunition. This suggests the shotgun is chambered for standard 12 Gauge shells and is capable of cycling various loads.

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