I have a Keltec SUB 2000 carbine in 9mm that accepts Glock mags. It folds in half and fits nicely inside an old laptop computer case along with several 32-rd Glock mags. Stealth at its finest. It also can be had in .40 S&W. Ruger manufactures a nice carbine in 9mm as well. It does not fold. (Maybe an after-market folding stock will become available by some enterprising provider)
