H&R DOE in 300 Blackout! - Everything you need to know | H&R + Palmetto State Armory

Published on September 8, 2025
Duration: 1:47

This video introduces the Harrington and Richardson (H&R) 300 Blackout DOE pistol, a new offering from Palmetto State Armory. It highlights the firearm's features, including an H&R brace, A2 grip, milspec trigger and safety, C7 style upper, and a 7.5-inch barrel with a 1:7 twist rate. The DOE is presented as a follow-up to the successful 9mm version, designed for similar aesthetics and performance.

Quick Summary

The H&R 300 Blackout DOE pistol from Palmetto State Armory features a 7.5-inch barrel with a 1:7 twist rate and a Kino style gas system with an AR-15 low profile gas block. It comes standard with an H&R brace, A2 grip, milspec trigger, milspec safety, and a C7 style upper. Two configurations, a complete pistol and an upper receiver, are available.

Chapters

  1. 00:00Introduction & Product Launch
  2. 00:37DOE 9mm Success & 300 Blackout Variant
  3. 00:47300 Blackout DOE Specifications
  4. 00:50H&R Brace, A2 Grip, Milspec Trigger/Safety
  5. 00:55C7 Style Upper & DOE Handguard/Sight Base
  6. 01:027.5 Inch 1:7 Twist Barrel & Thread Protector
  7. 01:09Kino Gas System & Low Pro Gas Block
  8. 01:16Testing with AAC Subsonic Ammunition
  9. 01:28Available Configurations: Pistol & Upper
  10. 01:35Official Launch Date

Frequently Asked Questions

What are the key specifications of the H&R 300 Blackout DOE pistol?

The H&R 300 Blackout DOE features a 7.5-inch barrel with a 1:7 twist rate, a Kino style gas system with an AR-15 low profile gas block, an H&R brace, A2 grip, milspec trigger, milspec safety, and a C7 style upper receiver. It also includes a 5/8 x 24 thread protector.

What configurations will the H&R 300 Blackout DOE be available in?

At launch, the H&R 300 Blackout DOE will be offered in two configurations: a complete pistol, as shown in the video, and a complete upper receiver assembly. This provides options for different user preferences and existing firearm platforms.

What type of gas system does the H&R 300 Blackout DOE use?

The 300 Blackout DOE utilizes a Kino style gas system. This system incorporates an AR-15 low profile gas block that is positioned discreetly beneath the handguard, contributing to a cleaner and more streamlined profile.

What ammunition was used to test the H&R 300 Blackout DOE?

The H&R 300 Blackout DOE was tested with subsonic ammunition from AAC (Advanced Armament Corporation). The video mentions shooting subs all day and training with the firearm, indicating good performance and reliability with this type of ammunition.

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