Sporterising a K31

Published on February 11, 2026
Duration: 0:22

This video demonstrates the process of sporterizing a Karabiner 31 (K31), a robust Swiss military bolt-action rifle. The presenter, Ziga, showcases how to modify the rifle for modern use, including the addition of an optic. The K31 is highlighted for its unique straight-pull bolt action and its original 7.5x55mm Swiss caliber.

Quick Summary

The Karabiner 31 (K31) is a highly regarded Swiss military bolt-action rifle, known for its accuracy and unique straight-pull bolt action. This video demonstrates sporterizing the K31, a process that involves modifying it for modern shooting applications, including the addition of an optic. The rifle is chambered in 7.5x55mm Swiss and offers excellent performance.

Chapters

  1. 00:00Shooting Demonstration
  2. 00:12Introduction to the Karabiner 31

Frequently Asked Questions

What is a Karabiner 31 (K31)?

The Karabiner 31 (K31) is a superb Swiss military bolt-action rifle, renowned for its accuracy and unique straight-pull bolt action. It's chambered in 7.5x55mm Swiss and is a popular choice for sporterization projects.

What modifications are shown for the K31?

The video demonstrates sporterizing a K31, which includes modifying it for modern use. A key modification shown is the mounting of an optic (scope) to enhance aiming capabilities for various shooting applications.

What are the key features of the K31 rifle?

The K31 is characterized by its robust construction, straight-pull bolt action for fast cycling, and its original chambering in the 7.5x55mm Swiss caliber. It's a reliable and accurate rifle often favored by collectors and enthusiasts.

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