Quote Originally Posted by Dutch110 View Post
I didn't even think about gas port size. I know the one on my carbine length 16 inch is yuuuuge. Cant imagine how big it would need to be on a middy to work correctly.
My 18" Dez Arms midlength has a 0.125" gas port, and is overgassed even with Tula and Red Army Standard, which I've heard are some of the weaker x39 rounds. Just put an adjustable gas block on it but haven't gotten it dialed in yet.