Swiss Schmidt Rubin K31 7.5×55 Straight Pull Bolt Action Rifle 7.5x55mm C&R
SOLD FOR: $1,025.00
LSB#: WY250418ML018
Make: Waffenfabrik Bern
Model: Karabiner Modell 1931 (K31)
Serial Number: 545684
Year of Manufacture: Circa. 1930s
Caliber: 7.5x55mm Swiss
Action Type: Straight pull bolt action, 6 round detachable magazine
Markings: The top of the receiver has a Swiss cross. The left side of the receiver is marked with the serial number. All parts are serial matched save for the magazine. The receiver has an import mark. There are various small Swiss proofs throughout.
Barrel Length: 25.5”
Sights / Optics: The front sight is a bladed post in an angled slot which is adjustable for windage with two protective wings. The rear sight is a tangent U-notch leaf marked out to 15. This rifle has a clamp-on Swiss Diopter set with a hooded front post and a large adjustable diopter rear sight clamped to the receiver.
Stock Configuration & Condition: The two piece wood stock has a semi-pistol grip, finger grooves, barrel band with bayonet lug and stacking rod, barrel band with sling loop, sling bar, sling well, and a metal buttplate. There are compression marks, scuffs, and scratches throughout the wood. There are no cracks. The LOP measures 12.5/8” from the front of the trigger to the back of the buttplate. The stock rates in about Very Good to Excellent overall condition.
Magazine Quantity & Condition: 1x detachable 6 round magazine in Very Good Condition with matching serial number.
Type of Finish: Blued
Finish Originality: Original
Bore Condition: The bore is semi-bright and the rifling is sharp. There is light erosion in the bore. There is minor fouling in the grooves. In this writer’s opinion, this bore rates 9.5/10.
Many military and C&R eligible weapons have bores that will show erosion. This is not only due to age but to the fact that corrosive primers were commonly used in ammunition worldwide. For example, the U.S. used corrosive ammunition throughout WWII. The U.S. military did not begin to phase out corrosive-primed ammunition until the 1950s.
Overall Condition: This rifle retains about 95% of its metal finish. There is light handling wear throughout. There are light spots of oxidation throughout. The screw heads show light use. The markings are crisp. Overall, this rifle rates in about Very Good condition for a C&R.
Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: 1 Magazine, leather sling.
Our Assessment: The Swiss Schmidt-Rubin K31 is widely regarded as one of the finest military rifles of the 20th century, thanks to its precision manufacturing, unique straight-pull bolt design, and the exceptional accuracy of the 7.5x55mm Swiss cartridge. Adopted in 1931 and used throughout the mid-20th century, the K31 reflects Switzerland’s dedication to marksmanship and craftsmanship even in standard-issue military arms. Built by Waffenfabrik Bern, these rifles were issued to a citizen-soldier army, and their high quality, matched parts, and tight tolerances make them highly sought after by collectors and shooters alike. This example is in very good condition, retaining about 95% of its original blued finish with minor handling wear and a few spots of oxidation. The bore is excellent, showing only light fouling and erosion, and the rifling remains sharp, making it an excellent candidate for continued range use. The wood stock is in strong condition with no cracks, just the usual dings and scuffs from military service. Notably, this rifle is equipped with a clamp-on Swiss diopter sight set, including a hooded front post and a precision adjustable rear diopter—a highly desirable setup for precision shooting.
With its matching serial-numbered magazine, strong bore, and complete configuration including a leather sling and rare diopter sights, this K31 is not just a collectible—it’s a high-performance military rifle. For enthusiasts of Swiss arms, fans of straight-pull actions, or anyone seeking a C&R-eligible precision bolt gun, this rifle delivers superb value, heritage, and functionality. Whether on the range or in a collection, it stands as a testament to Swiss engineering excellence. -R.E.
