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Reviews & Ratings for Primary Weapons Systems MK114 MOD 1-M .223 Wylde, 14.5in bbl Upper Receiver — 6 reviews

(6 reviews)
Primary Weapons Systems MK114 MOD 1-M .223 Wylde, 14.5in bbl Upper Receiver
Primary Weapons Systems MK114 MOD 1-M .223 Wylde, 14.5in bbl Upper Receiver
$1,209.95 $1,073.45 Save 11%
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Most Helpful Positive Review Amazing product
Ordered this upper from opticsplanet and PWS mod 1 lower from a different site. Surprisingly, ordering the upper and lower separately cost almost $300 less than purchasing the rifle as a whole. As for fit and function I am very surprised how smooth shooting this rifle is. As my first experience with a "gas piston" AR and reading how much more recoil they produce, I haven't found it to be true with this rifle. My other AR is a standard DI with a 16" barrel and it has more noticeable recoil than the PWS. The 14.5" barrel provides more accuracy than I am capable of. Smooth, accurate and reliabl...
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PWS mk114 -Recommended-

by Everydayminuteman, Verified Owner from ID, United States Written on February 20, 2025
Great price, lead time was what it was.... upper is fantastic, accurate, quality build, and engineered perfect.
Would recommend: Yes
Was it helpful to you? Yes | No
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What I ordered

by Mic, Verified Owner from AZ, United States Written on December 10, 2024
It's an upper, it's what I ordered. Came quick. Packaged nice. I like PWS. If you're reading this cause you're on the fence, do more Google-Fu. Reviews on Optics Planet are not the place to decide if you want to get this upper or not. Focker out!
Would recommend: Yes
Was it helpful to you? Yes | No
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PWS Mk114 upper

by Mule skinner, Verified Owner from CO, United States Written on April 20, 2024
PWS long strokes are a must if you are running suppressed. With an ajustable gas block, you eat alot less gas and with the long stroke piston you get multiple range sessions with out cleaning. Accuracy is comparable with a Di rifles.
Pros:
  • Accurate
  • less cleaning
  • Less gas in the face
Cons:
  • A little extra weight
Best Used for:
  • Anything you would use a DI for.
Would recommend: Yes
1 of 1 found the following review helpful.
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PWS is solid stuff!

by Dan, Verified Owner from FL, United States Written on April 7, 2023
I’m a huge fan of this company and they assemble an excellent upper. I’ve tried more than a few different brands but somehow PWS manages to deliver solid quality and finish again and again.

I highly recommend the PWS piston uppers over nearly every other brand, including POF
Would recommend: Yes
1 of 1 found the following review helpful.
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Accurate, light weight, runs clean

by CXFast, Verified Owner from NM, United States Written on October 20, 2020
PWS makes a great system. I love how clean the bolt and action stays compared to direct impingement uppers. It is also light weight for a piston upper and very accurate. Great fit and finish and the FSC comp works nicely.
Pros:
  • Accurate
  • reliable
  • Quality & Looks
Cons:
  • None
Would recommend: Yes
4 of 4 found the following review helpful.
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Last updated 2025-11-12 UTC.