I wonder what kinda gas port the Brownells 605 clone has? They said that they had to 'enlarge' it, but if it was that easy; why did other companies who have tried dissapator builds not just use the same 0.086 drill bit they use on their midlength builds :sarcasm:
If you dont know off the top of your head; a BRN 605 is a 15.5" barrel with a rifle length gas system.
https://www.brownells.com/firearms/r...rod124180.aspx
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