Swiss ZfK-55 Sniper Rifle

The Swiss military began experimenting with scoped sniper rifle during WWII, with the K31/42 and K31/43. These use periscopic optics permanently mounted to the side of the receiver, and were both found less than ideal. Experiments continued after WWII, and the periscopes were replaced with tradition style scopes on quick-release mountings. Eventually the idea of making the sniper rifles mostly parts-interchangeable with the standard K31 carbines w