Machine Gun Terminology Part 2: SMG, PDW, & Machine Pistol

Published on January 12, 2018
Duration: 13:05

This guide breaks down the distinctions between Submachine Guns (SMGs), Personal Defense Weapons (PDWs), and Machine Pistols (MPs), drawing on expert analysis from Ian McCollum. It clarifies the defining characteristics of each category, including caliber, form factor, and intended use, while also addressing the common overlap in terminology and the evolution of these weapon classes.

Quick Summary

Submachine Guns (SMGs) fire pistol cartridges and have shoulder stocks. Machine Pistols retain a handgun form factor for grip use. Personal Defense Weapons (PDWs) are compact firearms for support personnel, often with specialized armor-penetrating rounds, bridging the gap between pistols and rifles.

Chapters

  1. 00:00Introduction to Small-Caliber Machine Guns
  2. 00:52Submachine Gun (SMG) Definition
  3. 02:02Machine Pistol (MP) Definition
  4. 04:21Personal Defense Weapon (PDW) Concept
  5. 06:12Armor-Piercing PDWs
  6. 08:34Holsterable SMGs as PDWs
  7. 11:47Terminology Overlap

Frequently Asked Questions

What defines a Submachine Gun (SMG)?

An SMG uses a pistol caliber cartridge, features a shoulder stock (fixed or folding), and is capable of fully automatic fire. Examples include the French MAS-38.

How are Machine Pistols (MPs) different from SMGs?

Machine Pistols maintain a standard handgun form factor, intended for one or two-handed use from the grip. They are often modified semi-auto designs like the Glock 18 or Mauser C96 Schnellfeuer.

What is the purpose of a Personal Defense Weapon (PDW)?

PDWs are designed for non-combat troops needing more accuracy than a pistol but less bulk than a rifle. Modern PDWs like the FN P90 and H&K MP7 use specialized rounds to penetrate body armor.

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