It's the first M11 version with the silver piston and different nozzle.
I can't find any other system 7 internals except for nozzle itself.
Can one explain where to find the whole BBU for the system 7? Also if they use same hop up? Different mags?
The problem is the nozzle isn't retuning in place. Piston O-ring rubber is too thick or the nozzle is too small on it..
I've noticed VA BB's can't feed well on it as it splurts out..
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