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Old April 30, 2013, 03:43 PM   #12
Quentin2
Senior Member
 
Join Date: June 18, 2009
Location: NorthWest USA
Posts: 1,996
There's a good chance you'll see carbon fouling around the gas block, it's common with a new build. You only worry if it's excessive and doesn't seal up after a few hundred rounds.
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