Little Tom: the World's First DAO Automatic

Published on January 27, 2026
Duration: 1:07

This guide details the unique magazine loading and barrel disassembly process for the Little Tom pistol, the world's first DAO automatic. It highlights the bi-directional magazine insertion and the barrel's lug-and-slot locking mechanism, as demonstrated by Ian McCollum on Forgotten Weapons.

Quick Summary

The Little Tom pistol holds the distinction of being the world's first DAO (Double Action Only) automatic pistol. It features a unique bi-directional magazine loading system, allowing insertion from the top or bottom, and its barrel is removed by pushing it rearward to disengage a lug from a dovetail slot.

Chapters

  1. 00:00Introduction to the Little Tom
  2. 00:07Unique Magazine Loading
  3. 00:28Barrel Disassembly
  4. 00:40DAO Trigger Mechanism

Frequently Asked Questions

What makes the Little Tom pistol historically significant?

The Little Tom is historically significant as it is recognized as the world's first commercially produced automatic pistol to feature a Double Action Only (DAO) trigger mechanism, a notable innovation for its time.

How does the magazine loading system of the Little Tom work?

The Little Tom pistol has a unique bi-directional magazine loading system. Magazines can be inserted from either the bottom or the top of the grip, offering an unusual flexibility in reloading.

How is the barrel removed from the Little Tom pistol?

To remove the barrel from the Little Tom, it is pushed backward. This action disengages an oval-ended lug from a matching dovetail slot in the frame, allowing the barrel to be dropped free.

What is a Double Action Only (DAO) trigger system?

A Double Action Only (DAO) trigger system means that each pull of the trigger performs two functions: it cocks the hammer (or striker) and then releases it to fire the round. There is no separate single-action mode.

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