MGD PM9 Rotary-Action Submachine Gun

Published on May 8, 2025
Duration: 1:01

This entry details the MGD PM9, an unusual 9mm submachine gun featuring a unique rotary-action powered by a clock spring. Expert Ian McCollum demonstrates its highly compact folding capability and explains the innovative internal mechanism that eliminates the need for a traditional heavy buffer spring. The design allows for rapid deployment from its folded state, emphasizing its portability and unique engineering.

Quick Summary

The MGD PM9 is a unique 9mm submachine gun featuring a rotary-action powered by a clock spring mainspring. This innovative design allows the mechanism to rotate during firing, eliminating the need for a heavy buffer spring and enabling the firearm to fold into an extremely compact shape for enhanced portability.

Chapters

  1. 00:00Introduction to the MGD PM9
  2. 00:14Folding Mechanism Demonstration
  3. 00:25Internal Action and Firing Cycle
  4. 00:44Deceleration and Buffer

Frequently Asked Questions

What makes the MGD PM9 submachine gun unique?

The MGD PM9 is unique due to its rotary-action powered by a clock spring mainspring. This innovative design allows the entire mechanism to spin during firing and eliminates the need for a heavy buffer spring, contributing to its compact folding capability.

How does the MGD PM9's clock spring mechanism work?

During firing, the clock spring rotates, and its recoil action helps decelerate the bolt over a longer travel path. This continuous cycling of the spring acts as an over-travel mechanism, providing a unique firing cycle.

What are the key features of the MGD PM9's design?

Key features include its rotary-action clock spring mechanism, a folding stock, and a magazine well designed for extreme compactness. The firearm can fold into a very small rectangular shape for enhanced portability.

What are the benefits of the MGD PM9's rotary-action design?

The primary benefit is the elimination of a heavy buffer spring, which simplifies the mechanism and contributes to the firearm's ability to fold into an extremely compact package for easy transport and rapid deployment.

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