Does anyone have the dimension of the bores for mil spec gas blocks? I think the gas block I just purchased may be out of spec.
What makes you think it is out of spec? Who makes it?
So do you think it is too loose or to tight (won’t go on) ?
OP, I am assuming that you are referring to the size of the gas port so if that is not the case then disregard. As long as the port dimensions on the gas block are the same size or larger than the ones on the barrel you will not have any issues.