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Old February 11, 2013, 10:30 AM   #2
Senior Member
Join Date: June 18, 2009
Location: NorthWest USA
Posts: 1,996
It's really just a cosmetic issue. I noticed in my last build that at first it felt rough racking back the charging handle. No functioning problems though and after the first 100 rounds it smoothed out fine. I'd say the BCG will quickly smooth out the receiver's normal surface roughness in mating areas. Lube it and shoot!
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