Dunno, shot in the dark, just something I remembered about the CA M14 that stood out and bothered me was the wiring. Of course if it's just started doing this, it could be the carbon build up, but there has only been a few hundred rounds fired through it so that wouldn't be the case.
Oh, one thing I don't know if CA copied the flaw from G&G or no, but one of the contacts in the trigger assembly literally gets cut by arching. Will take a couple thousand rounds (if semi only), but happens with the G&G. The copper used is thin, and each time the contact block gets near the contacts, an arc happens and eats away at the metal right where the bend is.
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