I received the Airsoftpro gen 5 trigger today, super easy to set up, less fiddly then the AA trigger and I like how the spring catch is built into the trigger (no more loose small bolts) Just test fired the gun, everything is working as it should, I'm using a AA Tac receiver, springer custom zero piston, m130 AA spring, AA spring guide, AA teflon cylinder, ML cylinder head, AA chamber with TDC mod (Famingo 60 rubber) and a RA-Tech 6.02 barrel.
I have to say I'm super impressed and the fact that this only cost £73 makes this a absolute steal, my pull is now super smooth, even more so then the AA zero trigger which I honestly thought it wouldn't touch! I would 100% recommend the Gen 5 zero triggers.