Stemple 76/45 + Russian Lend-Lease Thompson Kit = STG-M1A

Published on October 8, 2021
Duration: 10:31

This guide details the disassembly and reassembly of the Stemple STG-M1A, a unique submachine gun built using Stemple tube receivers and Russian lend-lease Thompson parts. Expert Ian McCollum demonstrates how the 'round peg in a square hole' design allows for the use of original Thompson furniture while maintaining the legal status of the Stemple receiver. The process involves removing the receiver tube from its housing and extracting the bolt and recoil spring assembly for cleaning and inspection.

Quick Summary

The Stemple STG-M1A is a unique submachine gun built by BRP Corp, legally classified as a Stemple 76/45, that uses transferable Stemple tube receivers combined with Russian lend-lease Thompson parts. This innovative design allows it to mimic the appearance and operation of a Thompson submachine gun at a more accessible price point, while adhering to NFA regulations.

Chapters

  1. 00:00Introduction to the STG-M1A
  2. 01:01History and Parts Kits
  3. 03:01External Features and Controls
  4. 04:24Disassembly and Internal Design
  5. 05:55Bolt and Operating System
  6. 07:14Design Evolution
  7. 08:54Conclusion and Benefits

Frequently Asked Questions

What is the Stemple STG-M1A?

The Stemple STG-M1A is a submachine gun built by BRP Corp, legally classified as a Stemple 76/45, that incorporates Russian lend-lease Thompson parts. It uses transferable Stemple tube receivers housed within a square shell to mimic the appearance and function of a Thompson.

How was the Stemple STG-M1A developed?

It was developed by Brian Poling of BRP Corp by combining approximately 1,000 available Stemple tube receivers with inexpensive Russian lend-lease Thompson parts kits, offering a more affordable alternative to original transferable Thompson submachine guns.

What are the key features of the Stemple STG-M1A?

The STG-M1A features original Thompson parts like the stock, barrel, and handguard, operating in .45 ACP. It uses a Suomi-style bolt and a Thompson-like recoil spring, with early models accepting stick magazines but not drums.

Why is the STG-M1A legally distinct from a Thompson?

The STG-M1A is legally a Stemple 76/45 because it uses a Stemple tube receiver. This receiver is housed within a square outer shell, allowing the attachment of Thompson furniture while maintaining the legal classification of the core receiver.

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