The semi-automatic SUB2000 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 can accept most popular handgun magazines. Plus it can easily be disassembled for cleaning or inspection without tools. Ideal for backpacking trips and situations where space and convenience are paramount. - Caliber: 9x19mm or .40S&W - Weight Unloaded: 4.25lbs - Magazine Capacity: Varies by magazine - Overall Length: 30.5� - Length Collapsed: 29.25� - Length Folded: 16.25� - Barrel Length: 16.25� - Twist Rate: 1:10� or 1:16� - Trigger Pull: 9.5lbs