Primary Weapon Systems MK 111 PRO Part 3: Accuracy Test

Published on March 26, 2020
Duration: 5:28

This video details an accuracy test of the Primary Weapon Systems MK 111 PRO piston AR pistol at 100 yards. The test involved shooting five different ammunition loads, ranging from 35 to 77 grains, to assess the pistol's ability to stabilize various bullet weights and the impact of ammunition quality on accuracy. The results indicate the 11-inch barrel can achieve useful accuracy, with heavier, match-grade ammunition performing significantly better.

Quick Summary

The Primary Weapon Systems MK 111 PRO piston AR pistol demonstrated useful accuracy at 100 yards, with performance heavily influenced by ammunition quality. Heavier, match-grade loads like 69-grain Sierra Match King and 77-grain SSA Nozzler OTM produced tight groups, while lighter or frangible rounds struggled with stabilization.

Chapters

  1. 00:00Introduction to Accuracy Test
  2. 00:12Target Setup and Optics
  3. 00:26Ammunition Selection for Test
  4. 00:37Nozzler 35 Grain Test
  5. 00:41GBW Frangible 45 Grain Test
  6. 00:45Fiocchi 55 Grain .223 Test
  7. 00:52Sierra Match King 69 Grain Test
  8. 00:55SSA Nozzler 77 Grain OTM Test
  9. 02:28Accuracy Test Results & Analysis
  10. 02:38Ergonomics of Pistol Storage Device
  11. 02:52Performance of Light Ammunition
  12. 03:06GBW Frangible Performance
  13. 03:24Fiocchi 55 Grain Performance
  14. 03:4869 Grain Gorilla Performance
  15. 03:5877 Grain SSA Nozzler Performance
  16. 04:20Barrel Stabilization Conclusion
  17. 04:28Impact of Ammunition Quality
  18. 05:02Overall Accuracy Assessment
  19. 05:18Final Thoughts

Frequently Asked Questions

What is the accuracy potential of the Primary Weapon Systems MK 111 PRO at 100 yards?

The Primary Weapon Systems MK 111 PRO, with its 11-inch barrel, demonstrated the ability to achieve useful accuracy at 100 yards. While results varied significantly with ammunition type, heavier match-grade loads produced tight groups, indicating the pistol is capable of precision shooting when paired with appropriate ammunition.

How does ammunition quality affect the accuracy of the PWS MK 111 PRO?

Ammunition quality is a critical factor for the PWS MK 111 PRO's accuracy. Lighter, frangible, or lower-pressure loads showed poor stabilization and wider groups. Conversely, heavier, match-grade ammunition like the 69-grain Sierra Match King and 77-grain SSA Nozzler OTM yielded significantly better and more consistent accuracy at 100 yards.

Which ammunition types performed best in the PWS MK 111 PRO accuracy test?

The 69-grain Sierra Match King and 77-grain SSA Nozzler Open Tip Match ammunition performed best in the accuracy test for the PWS MK 111 PRO at 100 yards, producing tight and consistent groups. These heavier, match-grade rounds demonstrated the pistol's capability for precision.

What were the ergonomic considerations for the PWS MK 111 PRO during bench shooting?

The pistol storage device on the PWS MK 111 PRO was found to be 'a wee bit short' and 'not exactly ideal for bench shooting.' This made the shooting experience 'a little awkward,' but it did not prevent the assessment of the firearm's inherent accuracy potential.

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