As above, fitted a maple leaf jet inner barrel, made little difference, apart from the convenience of the adjustment wheel location.
And again as above, the Co2 nozzles aren’t great, the original GHK ones are far stronger. I found the Co2 mags from Samoon poor as well, the valves for me were rubbish. I don’t know if the Umarex Co2 mags are better, and who makes them, I know they have different base plates to the Samoon ones.