Mossberg 990 Aftershock RELIABILITY TEST with 500 rounds of 12 Gauge!

Published on July 30, 2025
Duration: 13:01

This video details a 500-round reliability test of the Mossberg 990 Aftershock 12 gauge shotgun. The test aimed to assess the firearm's suitability for self-defense by documenting malfunctions with various ammunition types. The durability of attached accessories, including an optic and flashlight, was also evaluated under sustained firing conditions. The firearm experienced numerous failures to eject and other malfunctions, ultimately failing to complete the 500-round test without significant issues.

Quick Summary

The Mossberg 990 Aftershock 12 gauge shotgun underwent a 500-round reliability test to evaluate its self-defense suitability. The firearm experienced numerous malfunctions, notably failures to eject, and did not complete the test. Number 4 buckshot proved particularly problematic, and accessories like the optic mount loosened under stress.

Chapters

  1. 00:00Introduction and Test Setup
  2. 00:24Importance of Reliability for Self-Defense
  3. 01:12Accessory Attachments and Expectations
  4. 02:01Test Participants and Firearm Preparation
  5. 02:38Test Round 1 Begins
  6. 02:47Optic Malfunction Observation
  7. 03:26First Malfunction: Hang Fire / Failure to Eject
  8. 04:00Ammunition Types and Malfunctions
  9. 04:42Number 4 Buckshot Issues
  10. 05:37Accessory Durability Check (Flashlight)
  11. 06:06Failure to Eject (Last Round)
  12. 06:22User Injury (Thumb/Finger)
  13. 06:31Double Feed Malfunction
  14. 07:02Failure to Eject (NSI's Noble Sport)
  15. 07:51Flashlight Still Working
  16. 08:19Component Loosening (Rail, Optic Nut)
  17. 08:58Malfunction: Failure to Eject
  18. 09:10Rail Loosening and Removal
  19. 09:20Failure to Eject (Last Round)
  20. 09:31Skipping Bird Shot to Test Reliability
  21. 10:01Flashlight Failure and Ejection Issues
  22. 10:15Slugs Ejecting Successfully
  23. 10:26Lost Screws and Components
  24. 10:42Failure to Eject at 300 Rounds
  25. 11:05Increased Malfunctions (Failure to Eject/Double Feed)
  26. 11:26Failure to Extract Round
  27. 11:39Recent Malfunctions and Cleaning Need
  28. 12:08Firearm 'Gave Up'
  29. 12:20Test Conclusion: Not Reliable

Frequently Asked Questions

What was the primary goal of the Mossberg 990 Aftershock reliability test?

The primary goal was to assess the reliability of the Mossberg 990 Aftershock shotgun for self-defense purposes by subjecting it to a 500-round endurance test and documenting any malfunctions.

Did the Mossberg 990 Aftershock pass the 500-round reliability test?

No, the Mossberg 990 Aftershock did not pass the 500-round reliability test. The test was concluded early due to a high frequency of malfunctions, including numerous failures to eject.

Which type of ammunition caused the most problems during the Mossberg 990 Aftershock test?

Number 4 buckshot was identified as the most problematic ammunition type during the test, causing more malfunctions compared to slugs and other buckshot loads.

How did the accessories perform during the Mossberg 990 Aftershock reliability test?

The accessories, including an optic and flashlight, were subjected to significant stress. While the flashlight surprisingly held up, the optic mount and rail loosened, and screws were lost, indicating durability concerns.

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