Gas block seepage?
I test fired an AR I built up and accuracy seemed horrible. Turned out there were some serious issues with the scope which I may or may not have fixed at this point. Accuracy got to a tolerable level after some adjustments.
I noticed something I have never seen before though. There seems to be some blowby from under the gas block. There was a heavy streaking of oil/carbon residue coming from under the front and rear of the gas block to about 1/2" out.
How serious a problem is this?
I didn't expect anything like this as, when I duracoated the rifle I had removed the gas block. When I put it back together the gas block was so tight I had to sand down the duracoat, oil the barrel and then tap the gas block on with a drift.
Any advice? do I need to do anything about this?
I own firearms not to fight against my government, but to ensure I will not have to.