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Old March 13th, 2011, 12:39   #4
Strelok
 
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Join Date: Jun 2006
Location: Brandon Manitoba
Yes, inner and the rubber. The unit itself doesn't really need any upgrading at all. In some cases the hopup arm requires a bit of bending (If your gun isn't shooting straight) but thats pretty much it. But if RA-Tech offers it, I suppose i'd get.
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