BSA Prototype .45ACP Pistol

Published on March 4, 2015
Duration: 8:09

This video details a rare BSA prototype .45 ACP pistol, highlighting its unique rotating barrel system and design influences from the FN Model 1910 and Steyr-Hahn pistols. It was developed by BSA post-WWI as they sought new markets. The pistol features a distinctive 8-round magazine with a two-handed release and an unusual rectangular flat mainspring. It also incorporates a grip safety, magazine safety, and manual thumb safety, locking open on an empty magazine.

Quick Summary

The BSA prototype .45 ACP pistol features a unique short-recoil, rotating barrel system, influenced by designs like the FN Model 1910 and Steyr-Hahn pistols. Developed post-WWI by Birmingham Small Arms, it also includes an 8-round magazine with a two-handed release and a rectangular flat mainspring.

Chapters

  1. 00:00Introduction: BSA Prototype .45 ACP
  2. 00:43BSA's Post-WWI Market Expansion
  3. 02:10Design Influences: FN 1910 & UK Patents
  4. 03:08Mechanical Features: Rotating Barrel System
  5. 04:00Unique Magazine & Mainspring Design
  6. 05:27Operational Details: Firing Pin Ejector
  7. 06:39Ergonomics and Slim Profile

Frequently Asked Questions

What is unique about the BSA prototype .45 ACP pistol's barrel system?

The BSA prototype .45 ACP pistol features a short-recoil, rotating barrel system. This mechanism is similar to designs found in pistols like the Steyr-Hahn 1911 and 1912, allowing the barrel to rotate to lock and unlock the breech during operation.

What historical context led to the development of the BSA prototype .45 ACP pistol?

Birmingham Small Arms (BSA) expanded significantly during WWI. Post-war, they sought new markets, leading to the development of various handguns, including this .45 ACP prototype, alongside models in .32 ACP and an experimental .34 caliber.

What design influences are evident in the BSA prototype .45 ACP pistol?

The pistol's firing mechanism shows a close relationship to the FN Model 1910. BSA was able to adapt this design partly due to a lack of specific UK patents, though very little documentation exists for these prototypes.

What are some notable mechanical features of the BSA prototype .45 ACP pistol?

Key features include an 8-round magazine with a two-handed release, a distinctive rectangular flat mainspring, grip, magazine, and manual safeties, and the use of the firing pin as an ejector, which is rare for a .45 ACP locked-breech design.

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