why shoot a 9mm AR when you can shoot this: [url]http://en.wikipedia.org/wiki/.458_SOCOM[/URL]
Thats a big chunk of metal!!! Awesome! But... the OP is obviously looking into a more economical range visit. I have the same question at mind as well, a 9mm AR mag would be nice.
That's what I'd want if I were on the streets on Mogadishu fighting guys all effed up on khat.