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

Published on February 23, 2025
Duration: 24:47

This guide details how to tune the H&R DOE SMG for improved reliability, particularly when using a suppressor. The video, presented by Garand Thumb, highlights the DOE's direct blowback action and offers specific recommendations for buffer weights to mitigate cycling issues. The speaker, identified as a subject matter expert, emphasizes that while fun and unique, the DOE may require some break-in or tuning to function optimally as a duty weapon.

Quick Summary

The H&R DOE SMG is a 9mm direct blowback submachine gun, originally developed for nuclear facility security. It features a 7-inch barrel and can achieve accurate hits out to 175 yards. Reliability issues, especially when suppressed, can often be resolved by tuning the action with a heavier buffer, like a KAK 8oz.

Chapters

  1. 00:00Introduction & Fictional Context
  2. 02:03H&R DOE Overview
  3. 03:32Range Performance & Drills
  4. 07:31Long Range Capability
  5. 11:28Technical Specs & Suppressor Use
  6. 15:16Design Features & History
  7. 20:09Final Assessment

Frequently Asked Questions

What is the H&R DOE SMG?

The H&R DOE SMG is a 9mm submachine gun originally designed for Department of Energy security forces guarding nuclear facilities. It's a reproduction of the Colt 635/633, now available to civilians from H&R (Palmetto State Armory) and operates via direct blowback.

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

Despite its short 7-inch barrel, the H&R DOE SMG demonstrated the capability to make consistent hits on steel targets at distances of 150 to 175 yards, dispelling myths about the limitations of short 9mm barrels.

What are common reliability issues with the H&R DOE SMG and how can they be addressed?

When suppressed, the H&R DOE SMG may experience reliability issues due to back pressure. Tuning the direct blowback system with a heavier buffer, such as a KAK 8oz buffer, is recommended to improve cycling and overall function.

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

The H&R DOE SMG features a 7-inch barrel with 5/8x24 threads, a folding front sight, a large metal heat shield handguard, an A1-style upper receiver, and a substantial brass deflector, reflecting its specialized security role.

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