The W+F K31 is a straight-pull bolt-action carbine chambered in 7.5x55 Swiss (GP11). Designed by Colonel Furrer at the Waffenfabrik Bern, it served as the standard-issue rifle of the Swiss Armed Forces from 1933 to 1958. This example, serial number 620828, is fitted with a W+F Bern competition diopter rear sight replacing the standard tangent sight — a configuration highly sought after by Swiss competitive shooters.
The carbine is in very good overall condition. The bluing is even and well preserved across the receiver and barrel. The walnut stock is solid, free of cracks or chips, with an honest patina from use. An original brown leather sling is fitted. A shooting club sticker is visible on the left side of the buttstock, indicating its sporting heritage.
Technical Specifications
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Manufacturer: W+F (Waffenfabrik Bern), Switzerland
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Model: Karabiner Modell 1931 (K31)
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Caliber: 7.5x55 Swiss (GP11)
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Action: Straight-pull bolt action (repeating)
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Capacity: 6-round detachable box magazine
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Barrel length: 652 mm (25.67 in)
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Overall length: 1100 mm (43.3 in)
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Weight: approx. 4 kg (8.8 lbs)
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Standard rear sight: tangent leaf graduated 1–15 (100–1500 m), with yellow chevron marker
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Diopter: W+F Bern, adjustable windage and elevation (knurled knobs), yellow "be" and "Hr" markings
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Stock: walnut, with shooting club sticker
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Sling: brown leather
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Serial number: 620828 (marked on receiver and magazine well)
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Country of manufacture: Switzerland
Markings
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Serial number 620828 stamped on the right side of the receiver and on the magazine well
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Swiss federal cross (coat of arms) in relief on top of the receiver
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Swiss proof marks visible at the base of the tangent rear sight
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Tangent rear sight graduated 1–15 with yellow chevron
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W+F Bern diopter with yellow "be" and "Hr" markings on adjustment knobs
Key Benefits
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Straight-pull bolt action: fast, smooth cycling — ideal for competitive shooting
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W+F Bern diopter: precision sighting system, adjustable for windage and elevation, valuable competition accessory
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Legendary accuracy: the K31 is recognized as one of the most accurate military bolt-action rifles ever produced
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7.5x55 Swiss GP11 cartridge: ballistically comparable to .308 Winchester, excellent medium- and long-range performance
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Swiss-made quality: exemplary machining and finish
Use Cases and Context
The K31 fitted with a W+F Bern diopter is the quintessential Swiss target shooting configuration. This carbine is perfectly suited for 300-metre precision target shooting — the signature discipline of Swiss shooting clubs. It also excels at long-range shooting and is a prized item for collectors of Swiss military firearms. Only 528,230 K31s were manufactured between 1933 and 1970, and examples fitted with W+F Bern diopter sights are particularly collectible.
Condition
Very good overall condition. Even, well-preserved bluing throughout. Walnut stock is solid with no cracks or chips; normal use patina. Bolt mechanism functions correctly. W+F Bern diopter sight in good working order. Shooting club sticker on the left side of the buttstock.
What's Included
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W+F K31 carbine with W+F Bern diopter sight
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6-round magazine
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Brown leather sling
