The final part arrived for my CO2 ZEV Custom, so here it is, the competed build, really happy with it, shoots well, although the APS CO2 mags need a little filing on the plastic base to deal with the RS ZEV magwell and seat correctly.
Guns Modify frame.
UAC internals.
RS ZEV Magwell.
ZEV Trilobite Slide.
ZEV Mag release catch.
ZEV Trigger.
I definitely learned a lot from doing this!