Isotta Fraschini (Albertini) Bent & Riveted SMG (MP40 Mag Version)

Published on June 17, 2026
Duration: 13:05

This video provides an in-depth technical examination of the Isotta Fraschini (Albertini) bent and riveted submachine gun, a late World War II development. The presenter, Ian McCollum, highlights its unique manufacturing process, which utilizes bent sheet metal and rivets instead of complex stamping and welding, making it simpler to produce. The review details its MP40 magazine compatibility, folding stock, controls, and internal mechanisms, offering a comprehensive look at this rare firearm.

Quick Summary

The Isotta Fraschini (Albertini) SMG is a unique late World War II Italian submachine gun distinguished by its bent sheet metal construction and riveted assembly, a departure from typical stamped firearms. This variant is compatible with standard MP40 magazines, with an estimated production of only 250-500 units.

Chapters

  1. 00:00Introduction to Isotta Fraschini SMG
  2. 00:26Development and Production History
  3. 00:49Isotta Company Background
  4. 01:10Bent Sheet Metal Manufacturing Technique
  5. 01:55Magazine Well and MP40 Magazine Compatibility
  6. 02:38Folding Stock Mechanism
  7. 02:56Controls: Safety and Fire Selector
  8. 03:09Magazine Release and Well Lock
  9. 03:46Markings and Serial Number
  10. 03:58Receiver Construction Details
  11. 04:20Sling Attachment and Muzzle Element
  12. 04:51Disassembly: Receiver Plug and Recoil Spring
  13. 05:14Bolt Removal and Design
  14. 05:35Bolt Guide Rails and Receiver Interaction
  15. 05:54Lower Assembly Removal
  16. 06:26Sights and Trunnion
  17. 06:48Sear Mechanism and Safety Functionality
  18. 06:58Production Numbers and Historical Context
  19. 07:22Magazine Variants and Historical Significance
  20. 07:58Conclusion and Thanks

Frequently Asked Questions

What makes the Isotta Fraschini (Albertini) SMG's construction unique?

The Isotta Fraschini (Albertini) SMG's construction is unique because it utilizes bent sheet metal and rivets instead of traditional stamping dies and welding. This method was designed for simplified manufacturing during late World War II, making it easier and faster to produce.

Which magazines does the Isotta Fraschini (Albertini) SMG variant shown use?

The specific variant of the Isotta Fraschini (Albertini) SMG shown in the video uses standard, unmodified MP40 magazines. A separate version was also made that utilized Beretta Model 38 magazines.

What was the estimated production number for the Isotta Fraschini (Albertini) SMG?

Production numbers for the Isotta Fraschini (Albertini) SMG are estimated to be very limited, between 250 and 500 units. The example featured in the video is serial number 225.

How does the safety mechanism on the Isotta Fraschini (Albertini) SMG function?

The safety mechanism on the Isotta Fraschini (Albertini) SMG locks the bolt when engaged, preventing it from opening. However, when the safety is disengaged, there is no mechanism to prevent the bolt from bouncing open and potentially chambering a round without the trigger being pulled.

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