believe it or not, however every m14 ive done work on has had that issue after replacing the stock rubber. the lips on the stock rubbers from what ive found are just a hair too long causing them to fold in upon contact with the nozzle (various marui base models as well as cyma ones as well
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current armament: mk43, ump.45, p90, barret, m14, g33, k98, m4 tac, m4 swat, mp5 navy, vsr10, p226, m9.
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