With all the talk of measuring a barrel gas port, I decided to figure out what is the proper way to measure the ports.
I am no machinist but I do like to have the right tools necessary the job at hand. How about these?
https://www.amazon.com/HFS-0-061-0-250-CLASS-PLASTIC-STORAGE/dp/B00UCQO4HM/ref=asc_df_B00UCQO4HM/?tag=viglink513607-ar15-20&linkCode=df0&hvadid=266132647823&hvpos=1o1&hvnetw=g&hvrand=17787651769349963726&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1016367&hvtargid=pla-489047100634&psc=1
Found this set on Amazon. Does this look it will cover the basic port sizes? (.061-.250)
Advice appreciated!