The semi-automatic Sub-2000 is designed to be the most convenient 9mm or .40 caliber rifle available. It's adjustable and foldable to 16.25 x 7 inches for easy storage and accepts popular handgun magazines. It can easily be disassembled for cleaning or inspection without tools. The Sub-2000 is ideal for backpacking trips and situations where space and convenience are paramount. Designed with a straight blow-back system, the Sub-2000 is very simple to operate and maintain. The sights are intuitive, the stock is adjustable and field stripping is a breeze. This model takes S&W M&P magazines.