A Sneaky Swiss Sniper for Israel: the ZK-31

Published on September 6, 2023
Duration: 9:56

This video details the ZK-31, a Swiss K31 rifle modified for Israeli forces, featuring a unique quick-detach Kahles scope mount. Ian McCollum, a recognized expert in historical firearms, explains the rifle's clandestine history and technical modifications, including the clever scope mounting system designed for rapid removal and the use of blank BDC rings for custom calibration. The presentation highlights the rifle's significance as one of the few K31 variants to see combat.

Quick Summary

The ZK-31 is a modified Swiss K31 rifle used by the Israeli Defense Forces (IDF) as a sniper weapon. Its acquisition involved a clandestine transfer, allegedly through Nicaragua, and it's one of the few K31 variants to see combat. It features a 4x Kahles scope with a unique quick-detach mount and custom-calibrated BDC rings.

Chapters

  1. 00:00Introduction to the ZK-31
  2. 00:35Clandestine History of the ZK-31
  3. 02:17Scope Mounting System Explained
  4. 03:33Markings and Secrecy on the ZK-31
  5. 04:46Kahles Scope Details and Calibration
  6. 08:13Reticle and Practical Use of the ZK-31

Frequently Asked Questions

What is the ZK-31 rifle?

The ZK-31 is a rare variant of the Swiss K31 rifle, specifically modified for the Israeli Defense Forces (IDF) to serve as a sniper rifle. It features a unique quick-detach scope mount and a Kahles optic, and is notable for being one of the few K31s to see combat.

How was the ZK-31 rifle acquired by Israel?

The ZK-31's acquisition is shrouded in secrecy. Switzerland couldn't sell directly to Israel, so they were allegedly sold to Nicaragua. The rifles reportedly sank at sea but mysteriously reached Israel, highlighting a clandestine arms transfer during the IDF's War of Independence.

What is unique about the ZK-31's scope mounting system?

The ZK-31 utilizes a clever and simple quick-detach mounting system. Two pins are drilled into the receiver, and a relief cut is made in the stock. A lever on the scope mount locks onto these pins, allowing for rapid removal and reattachment of the optic.

What kind of scope does the ZK-31 use?

The ZK-31 is equipped with a 4x Kahles scope, manufactured in Vienna. These scopes were supplied with blank brass BDC rings, enabling IDF gunsmiths to precisely calibrate them for specific ammunition and barrel ballistics.

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