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I've seen a couple out of spec SRC gearbox's .. one even seemed to be 1mm short in over all length and was causing the piston to contact the bearing guide ...
that was a V2 though in an M4 ...
I've had a couple G36's on my bench too where the hop chamber wouldn't mate properly to the nozzle/front of the gearbox... causing a pretty decent airleak. a previous owner even went to the extreme of installing a M140 spring to get 360 fps... when I got the hop and nozzle/gearbox to line up and play nice, it wouldn't feed.. I had to file a path in the feed tube and base of hop unit (less then 1mm .. but enough to stop a bb from feeding) ... all said and done I had to go into the Gearbox too cause now it was firing 450+fps ... and the nasty spring had done some not to nice things to the interior of the gearbox...
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Vancouver Island Gun Doc, custom builder.
Leader - M.E.R.C. multi enviroment recon CAVALRY
Quote:
"SIR!, you've gone mad with power!"
"Ofcourse I have, you ever gone mad without power, it's useless, no one pays any attention"
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The Cavalry Comes
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