Manufactured 1955-1958, the ZFK31/55 is a derivative of the K31 rifle configured for precision long range shooting that is complete with its matching 3.5X sniper scope. Reportedly 4,150 were produced in total. Blade front and tangent rear sights, with a combined flash hider and bayonet lug unit integrated into the sight, "Swiss Cross and Shield" engraved on the receiver ring, and a set of integrally forged scope bases on the left side of the receiver. Matching serial numbers visible on the barrel, receiver, bolt, and underside of the handguard. The magazine is non-matching numbered "4539" on bottom along with "Zf.Kar.", denoting use with a scoped rifle, and the scope is marked with non-matching number "4111" above "KERN AARAU/V=3.5/(view angle symbol)=75 0/00". The scope has a three-post reticle and is fitted with a set of integral claw bases. Smooth pistol grip beech stock, with a folding bipod just ahead of the magazine well, forearm grooves, checkered wrist, flat buttplate, and fitted with a brown leather Swiss sling. Import marked on the bottom of the barrel. Includes a scope case numbered "4111" on the lid to match the scope.

Excellent, retains 90% plus original blue finish with some scattered mild handling marks. The stock is also excellent with a few light handling marks, and distinct edges and grasping grooves. Mechanically excellent. The scope is also excellent, retains 99% original blue finish with scattered patches of light freckling, and crisp clear optics.