Amt 30
I had a carbine I picked up from a pawn shop for $60ish 15 years or so ago. (friend was in danger of losing it anyway, i paid it out)
That gun was probably the most "fun" I've ever had (its currently on long-term loan to my brother) and with it's low recoil, it would make a can DANCE.
I took a couple of deer with it, though its on the underpowered side for that. I've also always had a problem with the shells not fully ejecting--some stove pipe issues.
If I recall correctly, AMT made a semi-auto pistol in .30 Carbine.
Anyhow, I'd recommend it to be added to a collection--but if I was limited to how many rifles I could own, it would come after the CETME, AK, AR, then the carbine. (But, as stated, great gun for the wife or the older kids.)