I picked up one of these the other day and have really fell in love with it. I would have rather had the PC9 because I am just using it for plinking, but the 40 cal is great.This is my first 40 cal of any type and I was surprised with how hot this round is in a factory load.I can't wait to pick up some +P! Too bad it doesn't come in .45. Anyway, I done a search on here and read a few posts on the PC9 and since the PC9 and PC40 are identical, I got some good info, But if anyone can ad some insight on magazine options, I would like to hear it. Can the .40 round be used in a 9mm mag? Are the p89 magazines the only ones that will interchange?