Tommy Gun, Blank Adapted

Published on January 5, 2023
Duration: 2:15

This video demonstrates the operation of a semi-automatic Auto-Ordnance Thompson modified with a blank-firing barrel featuring a bore obstruction. The instructor highlights the importance of using blank ammunition and the functionality of a dummy barrel, emphasizing that even blank guns can be dangerous. The video also touches upon the legal aspects, referencing an ATF letter that classifies the firearm as a blank gun and not an SBR when configured this way.

Quick Summary

Blank-adapted Thompson firearms feature a bore obstruction in the barrel to simulate live fire using blank ammunition. Despite not firing live rounds, these firearms are dangerous due to expelled gas and debris, requiring strict safety measures. Legal classification as a blank gun, rather than an SBR, often relies on manufacturer documentation like ATF letters.

Chapters

  1. 00:00Introduction to Blank-Adapted Thompson
  2. 00:05Bore Obstruction Explained
  3. 00:11Visual Identification Challenges
  4. 00:21Using Blank Ammunition
  5. 00:36Movie Industry Firearms Caution
  6. 00:41Testing the Blank Fire System
  7. 00:50Muzzle Gas and Rippling Water
  8. 00:59Blank Guns Remain Dangerous
  9. 01:05Demonstrating L-Drum and Dummy Barrel
  10. 01:14ATF Letter and NFA Classification
  11. 01:24Blank Gun vs. SBR
  12. 01:30Caution with Modified Firearms
  13. 01:36Orifice Plugs and Bore Obstructions
  14. 01:41Ejection Distance of Brass
  15. 02:11Potential for Bolt Breakage

Frequently Asked Questions

What is a bore obstruction in a blank-firing firearm?

A bore obstruction in a blank-firing firearm is a modification within the barrel, often at the muzzle, that restricts gas flow. This allows the firearm to cycle using the pressure from blank ammunition, simulating the action of live fire for purposes like movie props.

Can blank guns be dangerous?

Yes, blank guns can be dangerous. While they do not fire live projectiles, they expel hot gases and debris from the muzzle at high velocity. This can cause burns, eye injuries, or other harm if not handled with extreme caution and proper safety protocols.

How is a blank-adapted Thompson classified legally?

A blank-adapted Thompson is legally classified as a blank gun, not an SBR (Short-Barreled Rifle), if it has a barrel that is specifically designed for blank firing and is accompanied by documentation, such as an ATF letter, confirming its status.

What are the risks of using live ammunition in a blank-firing firearm?

Using live ammunition in a firearm modified for blank firing, especially one with a bore obstruction, is extremely dangerous. It can lead to catastrophic failure of the firearm, such as a broken bolt, and severe injury to the shooter and bystanders.

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