MG38: Colt's Interwar Water-Cooled Machine Gun

Published on May 7, 2025
Duration: 0:58

This guide details the disassembly and key features of the Colt MG38/MG38B machine gun, based on the Browning Model 1917. It highlights specific Colt modifications like self-contained recoil springs and bolt weight reduction for increased rate of fire. The video emphasizes historical context and mechanical analysis from Ian McCollum.

Quick Summary

The Colt MG38/MG38B is a water-cooled machine gun based on the Browning Model 1917, chambered in .30 caliber. Colt enhanced its performance by introducing self-contained recoil springs and reducing bolt mass through drilling, increasing the rate of fire to up to 850 RPM. The 'B' designation signifies spade grips.

Chapters

  1. 00:00Introduction to the MG38
  2. 00:17Trigger and Top Cover Mechanism
  3. 00:33Recoil Spring Design
  4. 00:43Bolt Modification for Rate of Fire
  5. 00:52MG38B Model Designation

Frequently Asked Questions

What is the Colt MG38/MG38B machine gun?

The Colt MG38/MG38B is a water-cooled machine gun from the interwar period, developed by Colt. It is based on the Browning Model 1917 and chambered in .30 caliber, featuring Colt's specific design enhancements.

How did Colt increase the rate of fire on the MG38/MG38B?

Colt engineers modified the bolt by drilling holes to reduce its mass. This modification increased the firearm's rate of fire from the original Browning Model 1917's approximately 650 RPM to up to 850 RPM.

What does the 'B' signify in the MG38B model designation?

The 'B' in the MG38B model designation specifically indicates that these particular firearms were sold by Colt equipped with spade grips, distinguishing them from other variants of the MG38 system.

What are some key design improvements Colt made to the Browning Model 1917 for the MG38?

Colt introduced self-contained recoil springs, which were a significant improvement over the original design. Additionally, they modified the bolt by drilling holes to reduce weight and increase the rate of fire.

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