Kel-Tec's semi-automatic Sub-2000 is a rifle chambered for pistol cartridges and can accept most double column handgun magazines. The Sub-2000 is classified as a "sub-rifle" because of its small size, light weight, and the use of a pistol cartridge. It is intended as a compliment to the handgun with which it would have full interchangeability in ammunition and magazines. Easily be disassembled for cleaning or inspection without tools, it is ideal for backpacking trips and situations where space and convenience are paramount.