Terni M91 Carcano Semiauto Conversion

This rifle started out its life an a normal M91 Carcano long rifle, before being converted into an experimental self-loader by the Terni Arsenal. Rather than adding a gas piston to the barrel, Terni engineered a short recoil system. The barrel and bolt recoil together about a centimeter (3/8 inch) upon firing. Instead of the original bolt with two lugs and a 90-degree throw, a new 8-lug bolt was used, which only requires a slight amount of rotation to unlock. That un