Clearing a malfunction is quite basic. I'm guessing he had an improvised can without a neilson. You can tell he was a novice, cause he did not test his equipment.
If he didn't test his equipment he wouldn't have automatically started clearing after his first shot. He knew it was going to do that before he fired. This is the point I'm making.
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I'm not arguing with you on this. I am just stating they were familiar with the issue and knew how to correct the malfunction, which tells a lot.