K-31 Bolt Action Swiss Army Rifle in 7.5x55mm

Published on May 7, 2012
Duration: 7:49

The Schmidt-Rubin K-31 is a highly accurate Swiss service rifle chambered in 7.5x55mm Swiss, known for its unique straight-pull bolt action. Production spanned from 1931 to 1958, with stock materials varying between walnut and beechwood. Its tangent rear sight is adjustable up to 1500 meters, and it features a 6-round detachable magazine. The rifle consistently demonstrates impressive accuracy, even at long ranges like 440 yards.

Quick Summary

The Schmidt-Rubin K-31 is a Swiss service rifle chambered in 7.5x55mm Swiss, known for its accurate straight-pull bolt action. In service from 1931-1958, it features a tangent rear sight adjustable to 1500 meters and a 6-round magazine, demonstrating impressive long-range accuracy.

Chapters

  1. 00:00Introduction to the K-31 Swiss Rifle
  2. 00:40Straight-Pull Bolt Action & Stock Variations
  3. 01:45Sights and Receiver Markings
  4. 02:39Detailed Bolt Mechanism Explained
  5. 03:34Magazine, Chargers, and Soldier Tags
  6. 04:52Long Range Accuracy Testing at 440 Yards

Frequently Asked Questions

What caliber is the Schmidt-Rubin K-31 rifle?

The Schmidt-Rubin K-31 rifle is chambered in 7.5x55mm Swiss. This cartridge uses a bullet with a .308 diameter, similar to .308 Winchester, but is a distinct and powerful military round.

How does the K-31's straight-pull bolt action work?

The K-31 features a unique straight-pull bolt action. Unlike traditional bolts that rotate, the K-31's bolt handle moves linearly. Camming cuts in the bolt sleeve rotate locking lugs as the bolt cycles, requiring a firm 'slap' to ensure it's fully locked.

What are the typical sights on a K-31 Swiss rifle?

The K-31 is equipped with a Mauser-style tangent rear sight adjustable from 100 to 1500 meters. The front sight is protected by steel ears and is adjustable for windage using a special tool.

What is the significance of the 'soldier tag' found in Swiss rifles like the K-31?

The 'soldier tag' is a unique feature often found under the buttplate of Swiss military rifles. It typically contains the name, unit, and sometimes the address of the soldier to whom the rifle was originally issued, offering a personal historical connection.

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