Explaining The Gas System On An AR15

The gas system on an AR15 can be very confusing. Gas tube lengths, gas block diameter, buffer tube setup, and which barrel ties it all together?
We wanted to throw this video together to help explain it. Now this won't cover every single scenario because well, that would take forever. So if you have a specific question feel free to leave it below and we will try to help you out!
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All information provided is merely for entertainment and informational purposes. Should you decide to act upon any information provided, you do so at your own risk. Midwest Gun Works does not accept any liability for any mistakes, errors, or faults that may occur. Refer to the manufacturer for specifications of the products used. It is recommended that all modifications or repairs be done by a qualified Gunsmith.