Thread: G&G M4A1 Help
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Old February 28th, 2009, 00:35   #8
ybrik
 
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Join Date: Jun 2007
Location: Ontario, Canada
As for the BBs rolling down the barrel, check your hop-up rubber, you might have not put the small rubber which pushes the hop-up rubber against the BB.
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5.56x45mm + m27 = M249(SAW)
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