“The Pack-Rifle is a light weight, take-down, utility rifle. The receiver, and most other parts, of the Pack-Rifle are machined from high strength aluminum, while most wear parts and fasteners are constructed of stainless steel. The barrel is a precision button rifled, Cro-Moly liner with a carbon fiber composite outer. Carbon fiber is also used for the butt stock tube of the rifle. This construction makes the Pack-Rifle not only the lightest rifle out there, but very weather resistant also”

http://www.packrifle.com/packriflepictures.html

Not a bad item to have in a pinch.