I got mine yesterday and tried it out. Performance for me with green gas was... a little lackluster? I felt like my hop was being reduced over time, sometimes I'd put a fresh mag in and start shooting and I'd have 0 hop applied for 5 bb's, then too much hop for 10 more, then flat for the rest of the magazine. I also had extreme freezing (not using full auto either), where the bolt was frozen over and jamming up. I swapped to red gas for the rest of the night and didn't see as much freezing, but I wonder if since the bolt was freezing over, the bucking was also experiencing some cooldown, causing the inconsistent hop?
Either way, I've swapped to one of a spare 60 degree Decepticon. I initially put the i-key in too but there was a crazy amount of hop applied so I took it out. The hop arm doesnt seem to flex like the TM glock ones too so I'm pretty hopeful that this will work better.