I have a CZ 512 tactical that I was running suppressed for a while and I started having a number of issues with it. Sometimes it wouldn't go into battery and I was also experiencing lots of FTFs along with accuracy issues. I didn't have that many rounds through it and I cleaned it regularly but figured it just got especially gunked up from running suppressed so I broke it down and cleaned it really well. Was still having issues and it was within the CZ 5 year warranty period so I sent it to CZ. I called recently to check on it and they were having accuracy issues with it as well so they said they would send me a new gun. Nice, right! Here is where it gets even better. I have started to have doubts about whether or not a semiautomatic 22 mag is meant to be run suppressed so I called CZ back to see it they could just send me a new 512 American. It's a nice looking rifle and if I am not going to run the 512 tactical suppressed I don't need a threaded barrel. No problem they said. So sometime in the near future I will be getting a brand new 512 American. That is what I call customer service. Thank you CZ!