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One of the most common issues I see with guns that are not firing – is simply that something has come loose. If your gun was shooting fine, then suddenly isn’t, the very first thing I would suggest is to reach forward and check the suppressor is still on snuggly.
Especially with bush guns, a little knock or bump can be enough to ‘un-nip’ the can on the end of the barrel – and now you have something that is moving around the end of the barrel – causing a random shift of point of impact. Even on the range, after a couple of shots, some barrel thread/suppressor thread combinations, where each thread is at the opposite end of the tolerance allowance – you can have it slightly unwind and cause issues.
Some suppressors are actually designed to prevent this – with the ports angled so they can ‘self-tightens’ a little with each shot. While we have heard of people putting thread tape on the threads, its not something I can reccomend.
