A 9mm kel-tec sub2k that takes glock mags is on my list. I haven't really handled one (none at those specs) very much and never actually shot one, but I hear really good things out of them. It is pretty much the only current gun that is buy instantly and make room in the budget for it when found. It wouldn't replace the rifle caliber carbine for serious work, but it would fill a specific niche that I currently have open. I've done quite a bit of road traveling over the last few months (on a friend's futon as I type this) and, of course, take my pistols with me. I haven't been going to or through any notoriously bad places but have been bringing a long gun nontheless. My problem is I often end up in less than gun friendly places, and a cased long gun isn't the easiest thing to hide. The kel-tec would allow me to utilize existing ammo and mags, give me increased range and accuracy over a handgun, and allow me to haul it in a much more subtle and inconspicuous manner. It's size and ability to fold even smaller is the only reason I'm still wanting it. An ar based pistol caliber carbine doesn't get any smaller than my rifle caliber ar. Therefore, I prefer the range and power of the rifle caliber over the ability to share ammo and mags. Given unlimited funding, things may be different in the desire for an ar based one but not the choice of what to take with me.