Pictures would help a lot to make sure we know exactly what you are talking about.
I believe you are talking about the rear baffle.
On some rifles they are looser than on others. I suppose you could replace the springs that provide tension on the ball bearings (disassemble inside a plastic bag so you don't lose the ball bearings or old springs).
As long as the baffles don't fall off the rifle when assembled, I don't think it is a problem.
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