I bought one to put on a Kaos. It has a good adjustment range, consistent and feels good in hand. It is also easy to take apart, just be aware it uses metric Allen keys. Its a decent reg if you use it with HPA. Should be OK on CO2 in the right conditions. Only used it with CO2 once and won't be making that mistake again. I wasn't using an anti-siphon tank & liquid CO2 got into the reg and blew two o-rings. Lesson learned.