The Swiss K31 never saw widespread combat service, unlike the Mauser 98 or Lee-Enfield, but it remains one of the more interesting military rifles of the 20th century.
Switzerland adopted the K31 in 1933, introducing a refined straight-pull bolt action that distinguished it from conventional European service rifles.
FIME Group now offers original Swiss military-surplus K31 rifles to American collectors, with an MSRP of $599.99.
The Evolution of the Swiss K31
The K31 succeeded the earlier K11 carbine, retaining its straight-pull operating system while introducing several mechanical improvements.
Swiss engineers moved the locking lugs closer to the chamber, shortening the receiver and allowing for a longer barrel without significantly increasing the rifle’s overall length. The revised design also increased the sight radius, an important consideration for Switzerland’s military marksmanship standards.
The Swiss military relied on a citizen-soldier militia system that emphasized individual rifle proficiency. The K31 served within this system for decades before newer military rifles replaced it.
How the Straight-Pull Action Works
The K31’s defining feature is its straight-pull bolt action.
Conventional bolt-action rifles require shooters to lift and rotate the bolt handle before pulling it rearward. The K31 eliminates the need to lift the bolt handle. Shooters pull the handle straight back to extract and eject a spent cartridge, then push it forward to chamber the next round.
A cam-driven mechanism rotates the locking sleeve to lock and unlock the action. The design allows for a different cycling motion while maintaining the secure locking arrangement necessary for its military cartridge.
The K31 chambers the 7.5x55mm Swiss cartridge and uses a detachable six-round box magazine. Its traditional hardwood stock and iron sights preserve the familiar appearance of a European military service rifle, despite the unconventional action.
What to Expect from Military Surplus
FIME Group’s K31 rifles are original Swiss military-surplus firearms, not modern reproductions.
W+F Bern manufactured the rifles for Swiss military service, and surviving examples carry individual characteristics that reflect their age and history.
Collectors can expect variations in stock condition, wood grain, metal finish, and military markings. Some rifles show relatively minor cosmetic wear, while others display scratches, dents, and handling marks from years of service.
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These differences are typical of military-surplus firearms. Buyers should evaluate each rifle on its own merits rather than expect uniform cosmetic condition across the inventory.
The K31’s Place in a Military Collection
The K31 occupies an important place in Swiss military history.
While other European armies relied on conventional bolt-action designs, Switzerland continued developing its straight-pull system. The result was a service rifle with a distinctive operating mechanism and several improvements over its predecessors.
For collectors, the K31 offers more than an unusual mechanical design. Original military markings, stock condition, and manufacturing details provide useful insight into each rifle’s history. These characteristics also help distinguish individual examples within the broader military-surplus market.
The arrival of additional surplus K31 rifles gives collectors another opportunity to acquire an original Swiss service firearm. Its distinctive straight-pull action and military heritage make it an appealing choice for enthusiasts looking to expand their collections.
For those who appreciate the history and engineering behind classic military rifles, the K31 offers a chance to own an authentic piece of Swiss firearms history.
For questions about specifications or current availability, contact us at K-Var. We are always here to help.
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