Pistol Caliber Carbines are a blast to shoot. I have a KelTec Sub2000 and I love the thing. It also excepts 30 round Glock mags as well as the factory mag. I can consistently hit steel at a 100yds with it. I even rang the 200yd target a few times with it.
It also folds in half and it fits in a backpack just fine.
