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Posted: 2/27/2007 8:14:45 PM EST
I am shooting a new upper and have noticed that I am getting a lot of carbon build up on the trigger group. Does anyone know what would cause this?
Link Posted: 2/27/2007 8:27:05 PM EST
the gas tube spraying carbon back into the gun to cycle the action

it's normal.
Link Posted: 2/27/2007 8:27:58 PM EST

Originally Posted By sititunga:
I am shooting a new upper and have noticed that I am getting a lot of carbon build up on the trigger group. Does anyone know what would cause this?


It gets on your buffer tube too ya know
Link Posted: 2/27/2007 8:32:48 PM EST
Ding dong! Thanks, it just seems a lot more than my other upper - and that was only after about 60 rounds.
Link Posted: 2/27/2007 8:50:36 PM EST

Originally Posted By sititunga:
Ding dong! Thanks, it just seems a lot more than my other upper - and that was only after about 60 rounds.


You're probably breaking in the upper, and some of the chaffing got off.
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