Grant Hammond .32 ACP Prototype

Published on April 6, 2015
Duration: 10:10

This guide details the unique hybrid action of the Grant Hammond .32 ACP Prototype pistol, as explained by Ian McCollum of Forgotten Weapons. It covers the blow-forward and blow-back elements, automatic magazine ejection, and automatic bolt closure. The guide emphasizes understanding the complex, albeit currently non-functional, bolt locking system and the magazine's unique retention and ejection method. It's a deep dive into a rare prototype's mechanics, suitable for advanced enthusiasts.

Quick Summary

The Grant Hammond .32 ACP Prototype pistol showcases a rare hybrid action, blending blow-forward and blow-back principles. Key features include automatic magazine ejection and automatic bolt closure upon loaded magazine insertion, highlighting its experimental nature.

Chapters

  1. 00:00Introduction & Auction Context
  2. 00:24Grant Hammond Prototype Overview
  3. 00:46Historical Context: .45 Caliber Version
  4. 01:48Unique Hybrid Action Design
  5. 02:11Barrel and Slide Mechanics
  6. 03:45Bolt Locking System (Malfunctioning)
  7. 05:52Automatic Magazine Ejection
  8. 07:29Automatic Bolt Closure
  9. 08:17Efficiency and Design Rationale
  10. 09:23Conclusion and Auction Information

Frequently Asked Questions

What is unique about the Grant Hammond .32 ACP Prototype's action?

The Grant Hammond .32 ACP Prototype features a unique hybrid action combining elements of blow-forward and blow-back operating systems. This complex design includes automatic magazine ejection and automatic bolt closure upon loaded magazine insertion.

Why did the .45 caliber version of the Hammond pistol fail US Army testing?

The .45 caliber Hammond pistol failed US Army durability tests in 1917 due to significant reliability issues, recording 154 malfunctions and breakages over 5,000 rounds. This poor performance prevented its adoption.

How does the Grant Hammond .32 ACP Prototype achieve automatic magazine ejection?

The pistol's design incorporates a spring-loaded plunger and a release mechanism triggered by the slide's rearward movement after the last round is fired. This system expels the empty magazine automatically.

What is the significance of patent drawings for the Grant Hammond prototype?

Patent drawings were crucial for identifying the Grant Hammond .32 ACP Prototype. They provide detailed insights into the intended mechanical functions, especially for complex or experimental designs like its hybrid action and unique bolt locking system.

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