Quote:
Originally Posted by devbro
aside from these old questions, what kind of issues/problems should I anticipate with them?
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They're proprietary so be aware you might need to modify the body of the receiver(s) if it's not the same brands. Be aware that even if they are the same brand, it does not necessarily mean the aftermarket QC GB is compatible with the same brand...
Quick change gearbox brands: King Arms, ARES, APS, etc.
Can't comment on the best one but each version gearbox has a different brand that makes them for different guns e.g. p90, m4, g36, etc.