Just read the write up in the February 2018 American Rifleman magazine....
Sorry but not interested in the $500 Ruger "PC-9" (which IMO stands for Politically Correct 9mm carbine) .
If S&W or Ruger offered a factory made AR15 carbine in 9mm for $500 I would buy two.
This. I've been wanting a 9mm AR pistol or carbine, but the prices seem way too high for what they are. Even the PSA seem overpriced to me. Frankly, I'm surprised S&W or Ruger haven't made one. They would sell like crazy.
With all that said, I may spring for a PC9. I'm not a huge fan of its aesthetics, but I don't hate it either. Much of it would depend on what the price settles down to.