TexasCHLforum.com

You might find more food for thought here:

http://warriortalk.com/forumdisplay.php?f=167" onclick="window.open(this.href);return false;

This is a forum dedicated to PCC discussion.

WRT to HK MP5s and similar weapons, here is the opinion of one man who has used them: http://warriortalk.com/showthread.php?t=51813" onclick="window.open(this.href);return false;

Others have opined that the MP5 fit a niche (more practical accuracy than a handgun, higher capacity ) before M-4s were available, but now that M-4s are widespread, these are taking the place of the MP5 in police SWAT units. I do not know that for a fact, but seems logical enough.

Also, IIRC, 9mm loaded for smg/pcc use by military and police were hotter than those for pistol use, thus providing more zip than just a longer barrel. That probably doesn't apply to most citizen uses, unless you load your own.