THE AR-RPK!

Published on October 4, 2025
Duration: 1:30

This video details the construction of an AR-15 platform rifle designed to emulate the characteristics of an RPK. Key components include a 27-inch barrel (technically 24-inch AR-15), a large UltraDine muzzle brake for recoil reduction, a Devil Dog Concept side charger, and various Fab Defense accessories like the Rats stock, Gratus Grip, rail covers, and a sturdy bipod. The build aims for suppressive fire capabilities, utilizing a 60-round ATI magazine and chambered in 5.56.

Quick Summary

This AR-15 build is designed to mimic an RPK, featuring a 27-inch barrel with a large UltraDine muzzle brake for recoil reduction and a Devil Dog Concept side charger. It utilizes Fab Defense accessories and a 60-round magazine for suppressive fire capabilities in 5.56 caliber.

Chapters

  1. 00:00Introduction to the AR-RPK Build
  2. 00:10Fab Defense Components
  3. 00:21Barrel Length and Muzzle Brake
  4. 00:40Side Charger System
  5. 00:50Gunsmithing Education Resource
  6. 01:00High-Capacity Magazine and Suppressive Fire
  7. 01:25Caliber and Conclusion

Frequently Asked Questions

What makes this AR-15 build resemble an RPK?

This AR-15 build emulates an RPK through its extended 27-inch barrel, a large UltraDine muzzle brake for recoil reduction, and the addition of a side charging handle. These features, combined with accessories like a sturdy bipod and high-capacity magazine, aim to replicate the RPK's role in suppressive fire.

What are the key components of this custom AR-15 RPK build?

The build features a 27-inch barrel, an UltraDine muzzle brake, a Devil Dog Concept side charger, Fab Defense furniture (Rats stock, Gratus Grip, rail cover), and a spikes bipod. It's chambered in 5.56 and designed to use a 60-round ATI magazine for suppressive fire.

What is the purpose of the long muzzle brake on this AR-15?

The substantial muzzle brake from UltraDine on this AR-15 build serves to significantly reduce recoil. Its length also contributes to the overall aesthetic that resembles an RPK, while potentially aiding in muzzle stability during rapid fire.

Where can one learn about building firearms like this AR-15 RPK?

For those interested in gun builds and firearm construction, the Shoring Desert Institute offers an online gunsmithing degree program. You can find more information by visiting their website at sdi.tday.

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