CMMG 22LR Conversion Kit

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Seadog

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When running the 22LR conversion bolt and mags in an AR, does the gas tube length matter? Can it reliably function with a mid or rifle length?

Thank you
Like others mentioned it is straight blow back. The little bit of gas that comes back in the tube just blows right into the upper receiver because you’re 22 conversion has no gas key on it like a regular bolt carrier does. So The gas tube length doesn’t matter. Being blow back it would work without one a matter what.
 
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MilitantBEEMER

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Like others mentioned it is straight blow back. The little bit of gas that comes back in the tube just blows right into the chamber because you’re 22 conversion has no gas key on it like a regular bolt carrier does. So The gas tube length doesn’t matter. Being blow back it would work without one a matter what.
Makes sense. Just like a 9mm AR. Thanks for the information fellas
 

rlongnt

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Others have answered your question but one thing I'd add. I can tell you for sure one thing that will make them have stoppages is the design of the hammer in your AR. The one on the left with the notch might hang every few rounds and the one on the right will run fine. Both of my Colt LE6920s came with the one on the left. I'd already replaced one with a QMS which ran fine but the other choked. After some research I found out this was common with that style hammer. When I put the same style QMS trigger group in the other rifle the CMMG kit ran fine in it too. YMMV

Hammer.jpg
 

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