Quote:
Originally Posted by LastSpartan
I tend to remove the gears on the side and the hopup arm before pulling out the inner barrel, preventing losing/damaging the nub. You have to remove them anyway to put back the nub in place anyway. But I guess it's the same thing anyway 
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I've only ever done that once, but that was a brand new hopup unit that I was installing at the time.
it's easy to install with the gears in place. just use a long pair of tweezers or needle nose pliers to drop the nub back into place.