The SKS. If money is hard to come by and for a lot of us it is then you can't beat the SKS. It's not the best rifle in the world but you can get one for around $100 bucks. That's an incredible price for a good solid rifle. And it has the added benefit of the availability of cheap ammo. You can get crates of the stuff for a few hundred bucks.
|Beretta CX4 Storm|
As I said before there are lots of great carbines and rifles. The AK 47 family. The FN FAL family. The Ruger Mini 14. The M14 family of rifles. The list goes on forever. I am actually a big fan of my M1 carbine and would have listed it but for the fact that the .30 carbine ammo is getting a little harder to find.