Primary Weapons Systems MK111 Pro 11.85in Upper

Published on May 4, 2022
Duration: 10:53

This review covers the Primary Weapons Systems (PWS) MK111 Pro 11.85-inch piston-driven upper assembly. The reviewer highlights its slick rail, elegant design, and the benefits of a piston system, including reduced fouling and heat in the bolt carrier group. Key features discussed are the 223 Wylde chamber for accuracy and 5.56 NATO pressure handling, the three-position adjustable gas block for suppressor use, and the smooth operation of the bolt and charging handle. The upper is praised for its reliability and shootability, making it an excellent suppressor host.

Quick Summary

The PWS MK111 Pro 11.85-inch piston-driven upper receiver is praised for its clean operation, reduced heat, and excellent performance as a suppressor host. Its three-position adjustable gas block allows fine-tuning for different ammunition and suppressor setups, while the .223 Wylde chamber ensures accuracy and compatibility with 5.56 NATO rounds.

Chapters

  1. 00:00Introduction to PWS MK111 Pro Upper
  2. 00:09Piston Driven System Explained
  3. 00:32OpticsPlanet Pricing & Discount Code
  4. 01:11Direct Gas Impingement vs. Piston System
  5. 02:43Price Analysis and Discount Code
  6. 03:38Ammunition from Callaway Ballistics
  7. 04:09Barrel Specs and Features (11.85" Barrel)
  8. 04:52Thread Pitch and Muzzle Device
  9. 05:06Rail System Overview
  10. 05:08Barrel Material and Chamber (.223 Wylde)
  11. 05:27Adjustable Gas Block and Regulator
  12. 05:35Gas Adjustment Settings Explained
  13. 06:13Rail System Functionality and Heat Shielding
  14. 06:53QD Slot Consideration
  15. 07:04Rail System Lock-up and Alignment
  16. 07:28Custom Billet Upper Receiver Design
  17. 07:55Radiant Raptor Charging Handle
  18. 08:04Functionality and Reliability
  19. 08:10Smoothness of Bolt/Upper Interface
  20. 08:50Range Performance and Reliability
  21. 09:04Gas System Performance with Suppressor
  22. 09:25Piston Gun as Suppressor Host
  23. 09:38Overall Impression and Recommendation
  24. 10:05Final Thoughts and Missing Out
  25. 10:30Shout Outs and Discount Links

Frequently Asked Questions

What makes the PWS MK111 Pro a good suppressor host?

The PWS MK111 Pro is an excellent suppressor host due to its piston-driven operating system, which keeps hot gases and fouling out of the bolt carrier group. Additionally, its three-position adjustable gas block allows precise tuning to minimize gas blowback into the shooter's face when suppressed.

What are the advantages of a piston-driven upper receiver like the PWS MK111 Pro?

Piston-driven uppers, such as the PWS MK111 Pro, operate by using a piston to cycle the bolt carrier group. This design isolates the bolt carrier group from direct exposure to hot gases and carbon fouling, leading to a cleaner firearm, reduced heat transfer, and potentially longer intervals between cleanings compared to traditional direct gas impingement systems.

What is the significance of the .223 Wylde chamber in the PWS MK111 Pro?

The .223 Wylde chamber in the PWS MK111 Pro upper offers a significant advantage by combining the accuracy potential of a .223 Remington chamber with the ability to safely fire 5.56x45mm NATO ammunition. This hybrid chambering provides shooters with flexibility and enhanced precision.

How can I get the best price on the PWS MK111 Pro upper from OpticsPlanet?

To get the best price on the PWS MK111 Pro upper from OpticsPlanet, check their mobile app, which offers a significantly lower price than the website. Additionally, use the discount code '704TAC' at checkout for an extra 5% off your purchase.

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