After thinking about this a bit...I'll try the following:
Rebuild 1:
1a - swap different hopup unit/inner barrel/hopup rubber into this build
2a - swap a different M4 nozzle into this build
if that doesn't work (if it doesn't work, ideally it'll give me the same low FPS and not something almost there!)...
Rebuild 2:
- swap in different piston head/cylinder head into questionable mechbox
I can't think of why it would make such a huge difference...but it's worth trying
Last ditch
- swap in different mechbox/hopup (known good build)
maybe there's an issue with this M4 body...(hope not, it's pretty)
If none of that works...my junker bin is going to be overflowing with a box full of primo stuff and I'm switching to AK's
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