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Vfc m4 quake upgrade?
Hey there just bought a new vfc m4 quake. Im looking to upgrade internals. Ive heard there was an issue with the piston, piston head slapping and cracking the gear box after a fair bit of usage. Can anyone help me out and elaborate on a way to prevent this from happening? For example what kind of parts i should replace even info on brands would be great to hear. Thanks.
P.S This gun is pretty much new out of the box. Its sights haven't been lined up on any player yet :P.
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