I'd rather have a Kel Tec SUB 2000. I recently got one in .40 and it's a terrific carbine. Small, light, folds up, comes in several magazine-types (Glock, Beretta, S&W). But mainly, designed from scratch to be a pistol-caliber carbine. There was one M1icon Carbine variant that was interesting - in .45 Winchester Magnum!!!