You’re about to get a bunch of people who spent too much on blowback guns tell you it’s great, what a bunch of people who paid too much for a roller locked tell you that it’s the only way.
GO TRY IT OUT FIRST.
If you know the difference, imo you won’t be happy. But for some reason this forum has turned into “if you think blowback has too much pop or gas or recoil, ur jest a pussy”. Instead of any objective discussion as to what and how good systems work. Let alone never any evidence in the way of split times or repeatable drill performance.
So go get hands on, because you won’t get a good answer here. Either you know the difference and won’t be happy, or won’t care, or don’t know and in that case yea man do whatever.
I tried almost every PCC out there and for suppressed and competition landed on CMMG. But there is a long term reliability issue, you have to switch the injector springs out fairly frequently. I haven’t tried a GHM9, but the APC9 was a huge let-down, and the GHM is pretty damn similar. Someone here tried to say the GHM was better than the APC9 because of the long travel bolt, but if you look at the charging handle, it’s not long travel (like a sten or etc) at all.
IDK, good luck if your going to use the data you collect here. Just buy it and sell if you don’t like.