K-31 Bolt Action Swiss Army Rifle in 7.5x55mm

Published on May 7, 2012
Duration: 7:49

This guide details the operation and basic maintenance of the Schmidt-Rubin K-31 Swiss service rifle. It covers the unique straight-pull bolt action, including proper closing technique and safety engagement. Information on magazine loading, sight adjustment, and identifying rifle production years via stock material is provided. The guide emphasizes safe handling and the historical significance of features like the soldier's tag.

Quick Summary

The Schmidt-Rubin K-31 is a Swiss service rifle chambered in 7.5x55mm Swiss, known for its exceptional accuracy and unique straight-pull bolt action. It features a tangent rear sight adjustable to 1500 meters and utilizes a 6-round detachable magazine. Production years can often be identified by stock material (Walnut pre-1944, Beechwood post-1944).

Chapters

  1. 00:00Introduction and History
  2. 00:40Action and Stock Variations
  3. 01:45Sights and Markings
  4. 02:39Bolt Mechanism Deep Dive
  5. 03:34Magazine and Soldier Tags
  6. 04:52Range Testing

Frequently Asked Questions

What is the primary action type of the Schmidt-Rubin K-31 rifle?

The Schmidt-Rubin K-31 features a unique straight-pull bolt action. This design allows the bolt to cycle linearly (forward and backward) without the traditional rotation needed in other bolt-action rifles, making it faster to operate.

What caliber is the K-31 chambered in, and how does its bullet diameter compare?

The K-31 is chambered in 7.5x55mm Swiss. This cartridge uses a bullet diameter that is very similar to the .308 Winchester, contributing to the rifle's effective range and accuracy potential.

How can one identify the production period of a K-31 rifle?

The stock material used for the K-31 can indicate its production period. Walnut stocks were typically used from 1931 to 1944, while Beechwood became standard from 1944 to 1958. Stock color variations can also be a clue.

What is the effective range of the K-31's sights?

The K-31 is equipped with a Mauser-style tangent rear sight graduated from 100 to 1500 meters. This allows for precise elevation adjustments suitable for long-range shooting, and the front sight is protected and adjustable for windage.

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