This Gun Was Made To Defend Nuclear Reactors. The H&R DOE

Published on February 23, 2025
Duration: 24:47

This review of the H&R DOE SMG, a 9mm direct blowback weapon, highlights its historical context and recent civilian release. The video details its performance in drills, surprising long-range capability for a 9mm subgun, and technical specifications like its 7-inch barrel and 5/8x24 thread pitch. Expert analysis from Garand Thumb suggests it's a fun, unique enthusiast firearm that may require tuning, particularly with a suppressor, recommending a heavier buffer for improved reliability.

Quick Summary

The H&R DOE SMG is a 9mm direct blowback submachine gun originally developed for U.S. nuclear facility security. It features a 7-inch barrel with a 5/8x24 thread pitch and has shown surprising accuracy at 150-175 yards. For reliable suppressed fire, a heavier buffer like the KAK 8oz is recommended to manage back pressure.

Chapters

  1. 00:00Introduction: Fictional DOE Defense Scenario
  2. 02:03H&R DOE SMG Overview & Civilian Release
  3. 03:32Range Performance: Bill Drill & Mozambique
  4. 07:31Long Range Accuracy Test (150-175 Yards)
  5. 11:28Technical Specs: Barrel Threads & Suppressor Tuning
  6. 15:16Unique Design Features & History
  7. 20:09Final Assessment: Enthusiast vs. Duty Weapon

Frequently Asked Questions

What is the H&R DOE SMG and its historical significance?

The H&R DOE SMG is a 9mm direct blowback submachine gun originally designed for the elite security forces tasked with defending America's nuclear facilities. It's essentially a reproduction of the Colt 635/633, modified for the Department of Energy's specific needs.

How does the H&R DOE SMG perform at longer ranges?

Despite its short 7-inch barrel and 9mm caliber, the H&R DOE SMG demonstrated surprising accuracy, consistently hitting steel targets at distances of 150 to 175 yards. This performance challenges common assumptions about the limitations of short 9mm barrels.

What modifications are recommended for suppressed use of the H&R DOE SMG?

When using a suppressor, the H&R DOE SMG may require tuning due to increased back pressure. A common recommendation is to install a heavier buffer, such as a KAK 8oz buffer, to ensure reliable cycling.

What are the unique design features of the H&R DOE SMG?

Key features include a 7-inch barrel with a 5/8x24 thread pitch, a folding front sight, a large metal heat shield handguard derived from port-firing weapons, an A1-style upper receiver, and a substantial brass deflector.

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