Thread: G&G M4 Blowback
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Old August 17th, 2009, 02:13   #5
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Join Date: Aug 2006
Location: Tokushima, Japan
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It uses some non-standard gearbox parts.

Now I have yet to take one of the blow-back ones apart... but I'm told that is uses a proprietary gearbox shell and piston.

The blow back is extremely pathetic... and hardly worth the extra cost... (In my opinion)
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