mikein, you are correct on the SR 9 and Security 9 mags. The PCC ships with that magazine insert installed and a Glock magazine insert in the box. Another insert for the Ruger American 9mm is available from Ruger. I put my name down for one of the carbines at Sports South whenever they get any( no shipping date available). I did get in my SR-9 double pack of magazines though. For those that don't know, Ruger sells a double pack of SR-9 magazines at a considerable savings. I already had 3 for my SR-9E. Hopefully, Ruger, Brownells, MagPul, or some other aftermarket source with make the inserts for Sig, S&W, and Beretta mags. Bob! :wink: