There's just not a lot out there for less than a grand, and for a grand, I can a decent AR.
That's why I bought a 9 MM AR. All of the mags, (Colt or Uzi style), hold 32 rounds, (10, 15 and 20 rounders are available), they aren't expensive, they're easy to obtain, and they function well. It's better to spend a few hundred more and get something you're going to be happy with, than settle for something that doesn't light your fire and only makes a few sparks, then dies out.
I was in the same boat that many here have commented about. I looked at the Beretta, and to me it looked like a cheap toy. Too much plastic. I don't believe the Just Right Carbine was out yet. If it was I hadn't heard or read about it. So after checking into 9 MM AR-15's, I went with a Rock River Arms 9 MM over the Colt.
It ran a couple hundred less at the time, but what swung me was the fact the Rock River Arms lower was milled solid as a dedicated 9 MM. I didn't care for the pressed in mag well block Colt uses. The Rock River seemed more solid in that regard. They take Colt style magazines, and there are a lot of manufacturers who make them. Colt, C-Products, (the best from a quality vs. value standpoint), Pro-Mag, and a bunch more I'm forgetting.
It's been almost 3 years since I bought it, and I'm glad I did. It runs like a scalded dog with most any type of 9 MM ammunition, from standard cheap Ball to the high performance defense stuff. If you get one just be sure to buy a Uplula Mag Loader, or you'll bust your fingers loading the mags to full capacity.

