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Reviews & Ratings for CMMG, Inc 22LR Mk4 Upper Receiver Groups — 4 reviews

(4 reviews)
CMMG, Inc 22LR Mk4 Upper Receiver Groups
CMMG, Inc 22LR Mk4 Upper Receiver Groups
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Most Helpful Positive Review Cmmg 22 ar15a4 Upper
Functions flawlessly. Very accurate at 100 yards practicing on NRA High power reduced targets. Great fun. Has the look and feel , but not the weight of original. No problem in cleanup that is experienced with the 22 conversions. The barrel is a proper 22 rim fire inside diameter of .222 as opposed to the .224 of the standard .223 . Bubby
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Amazing 22LR Upper, but why no mag?

by XenoEktika, from VA, United States Written on December 25, 2017
Amazing quality 22LR Upper, but why no magazine included. Many 22 Lr AR uppers include the mag, but not this one. But this being my ony complaint, still going to give 5 stars, just sad I got to wait to shoot now. Wife got me this for Christmas
Pros:
  • Amazing all metal, quality!
Cons:
  • No Mag included
Best Used for:
  • Plinking on the low
Would recommend: Yes
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Works Great

by Capn Mike, Verified Owner from MA, United States Written on May 16, 2017
The quality of this upper is top notch.
Shoots great and is able to use Black dog mags, as well as S&W15-22 mags with the "better mag" adapter, making the last round bolt hold open fully functional. Its much more accurate than my 1/7 twist AR upper with a conversion kit.
Not cheap, but it is the best way to shoot 22lr out of your SBR lower.
Pros:
  • Accurate
  • top notch quality
Cons:
  • price
Best Used for:
  • target
  • tactical training
Would recommend: Yes
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CMMG PDW 22lr upper

by boots, Verified Owner from WV, United States Written on April 10, 2017
Just like the other cmmg 22lr upper long gun I have works perfect. This is used on my 22lr AR15 pistol build and already have 500rds thru it with no complaints. Got it on sale 485. w/free shipping. Very satisfied thank you optics planet for carry a great product at a good price.
Pros:
  • light
  • Keymod forend
  • Cycles smooth as butter after I smoothed out my existing FCG
Cons:
  • None
Best Used for:
  • Squirrel hunting
  • plinking with family
Would recommend: Yes
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Last updated 2025-11-12 UTC.