The MP40 Full Auto Submachine Gun

Published on May 26, 2015
Duration: 7:09

This guide details the field stripping process for the MP40 submachine gun, as demonstrated by expert presenters. It covers the removal of the bolt carrier group and recoil spring assembly, highlighting the unique 'constant recoil' mechanism facilitated by a telescoping firing pin that acts as a pneumatic buffer. Proper safety precautions are emphasized throughout the procedure.

Quick Summary

The MP40 submachine gun utilizes a unique 'constant recoil' operating system, featuring a telescoping firing pin that acts as a pneumatic buffer to absorb recoil. This design, combined with a relatively slow cyclic rate, contributes to its exceptional controllability in full-auto fire, making it a favored weapon among German NCOs in WWII.

Chapters

  1. 00:00Introduction to the MP40
  2. 00:41Constant Recoil Mechanism Explained
  3. 01:40Firing Modes and Cyclic Rate
  4. 02:30Controllability and Ergonomics
  5. 04:10Field Stripping and Internal Design
  6. 05:52Ammunition Testing

Frequently Asked Questions

What is the MP40's unique operating system?

The MP40 features a 'constant recoil' system. Instead of the bolt slamming into the rear of the receiver, a telescoping firing pin assembly acts as a pneumatic buffer, absorbing recoil and contributing to its smooth operation.

How controllable is the MP40 in full auto?

The MP40 is known for its extreme controllability, even in full-auto fire. Its relatively slow cyclic rate allows experienced shooters to manage bursts effectively and even achieve single shots with practice.

What are the key steps for field stripping the MP40?

Field stripping involves ensuring the firearm is safe, removing the magazine, pushing the takedown disc, pulling the bolt carrier group rearward, lifting it out, and then removing the recoil spring assembly. Reassembly is the reverse.

What ammunition was tested in the MP40?

The MP40 was tested with both 124-grain brass-cased and 115-grain steel-cased 9mm Parabellum ammunition. The firearm demonstrated consistent performance and cyclic rate regardless of the ammunition type.

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