LMG-25: The Swiss Toggle-Locked Light Machine Gun

Published on December 29, 2025
Duration: 16:07

This guide details the field stripping process for the Swiss LMG-25 light machine gun, as demonstrated by Ian McCollum. It covers the removal of the barrel and bolt assembly for cleaning or maintenance. The video also highlights the unique toggle-lock action and the importance of the API system.

Quick Summary

The Swiss LMG-25 is a toggle-locked, recoil-operated light machine gun developed by Adolf Furrer of Waffenfabrik Bern. Chambered in 7.5x55mm Swiss (GP11), it features a 30-round magazine and a unique Advanced Primer Ignition (API) system for adjustable recoil and rate of fire.

Chapters

  1. 00:00Introduction to the LMG-25
  2. 02:04External Features and Controls
  3. 03:44Accessories and Grips
  4. 04:27Advanced Primer Ignition (API) System
  5. 06:01Field Stripping and Internal Mechanics
  6. 11:09Tripod Operation
  7. 12:51Additional Kit and AA Configuration
  8. 15:14Production History and Variants

Frequently Asked Questions

What is the primary action type of the Swiss LMG-25?

The Swiss LMG-25 features a toggle-locked, recoil-operated action. This system, developed by Adolf Furrer, is a heavier adaptation of the toggle-lock mechanism famously used in the Luger pistol.

What caliber does the LMG-25 fire, and what is its magazine capacity?

The LMG-25 is chambered in the standard Swiss 7.5x55mm GP11 cartridge. It utilizes a 30-round detachable box magazine, which is also compatible with the later Stgw 57 rifle.

What is the function of the 'Normal' vs. 'Advanced' primer ignition selector on the LMG-25?

The API selector adjusts the firing cycle. 'Advanced' mode ignites the primer while the bolt is still moving forward, reducing felt recoil and cyclic rate. 'Normal' mode is used for reliability in adverse conditions, such as when the gun is dirty or firing downhill.

Who developed the LMG-25, and where was it manufactured?

The LMG-25 was developed by Adolf Furrer, director of Waffenfabrik Bern. It was manufactured by Waffenfabrik Bern in Bern, Switzerland, with production running from 1924 to 1946.

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