Yup, the sub 2000 is a fantastic budget carbine. They make models to accept glock, beretta, or Smith m and p mags (maybe others??) And they conveniently fold. However, they are mostly made of plastic , and the longevity of shooting over 5000 rounds through one with out issue is often debated. I had to send mime off once to Kel TeC but I was impressed with there great customer service.TNW Aero Survival rifle in multiple calibers.
Sub 2K has been mentioned.
Hi-Point. Don't laugh, they are fun little carbines that run and run and run.
Go for the gangster look with a Thompson.