I have no idea what size port a 7.62x39 would run but we need to know if he's having a failure to eject or failure to extract problem before we can offer ideas in the right direction.
But I have a feeling he's just screwing around.
No, I'm not screwing around, I'm waiting on a barrel nut to come in so I can properly put the barrel back on. I got my new gas block and tube last week, I just need to find the time to get everything back together and go to the range to see how it shoots. If the issue still exists, I will take pictures and post them.
