...FX need to up their quality control.
Yes, sad but true.
I've recently returned a Dreamline Tact and an M3 to the vendor for refund (nice that some vendors allow this within a 60 day window). Dreamline issues really surprised me as this is a pretty simple gun in comparison to other FXs. But when I shot it for the first time (just getting chrono numbers at different hammer spring wheel settings), I first got an average of 861 fps at HS=22, with an ES of 7 and an SD of 2.1. It seemed really nice for some of the first shots out of the gun. So I ran it at other HS settings, re-filled with air as it was getting close to the reg pressure, and continued on. Nothing seemed to beat HS=22, so I ran 10 more shots there and got avg 829 fps, ES=18 and SD=6.1. A little head scratching on my part, so I ran some more settings, re-filled as necessary, and eventually went back to HS=22 for a 3rd time. This time avg was 773 fps with an ES=44 and an SD=14.1. WTF? And all of this occurred within the first hour of shooting my new gun.
There is probably something I could have done to address this performance. But I have gotten gun shy about FXs which don't work right out of the box. I had bought an Impact MkII probably a month before the M3's came out. Gun shot pretty well, but the gun had a funny squeak when the plenum was refilling, and pretty much during every shooting session it would start to leak air between shots until I did a rapid cock & dry fire multiple times. Contacted FX about this months ago and they were very nice - we'll send you repair parts or you can send the gun in. I chose to get the parts (in hindsight I probably should have just sent the gun in). It took me until yesterday to get up the courage to get into my Impact and replace the valve house and valve/rod. Deepest I have ever been into an Impact, and probably don't want to go that deep again. But it seems to work better now - we'll see after a shooting session today.
Gun I'm sending back today is an M3 which I hadn't shot since receiving it last month. Now I recall the gun having 100+bar in it when I received it - I always cock and fire any new gun I receive in a safe direction just to ensure that a pellet wasn't left in the chamber. But when I went to scope it up for its first testing, the pressure in it was close to zero. So small leak somewhere. Could probably have found and fixed it, but it is a brand new gun so back it goes for a refund.
And that doesn't even count the Mav Compact I bought maybe 6 months ago, which really wanted to dump all of its air between shots during a shooting session. That one went back for a refund as well.
I don't know whether end-user complaints will be enough encouragement to FX to up their quality control game. But they have to be spending more money than they want in having to fix new guns, and ultimately the dealers may have a loud enough voice as they keep getting new FX's back, to either refund the customer's money or to have to fix.
But in the end I guess that I am a contributor to this issue. Yes, I'm an FX fanboy. I keep on buying their guns even though I have recently been getting some with issues. In the end I have many more great FX guns than problem ones. But still too many problem ones seem to be getting through these days to the end user.