What's the deal with Radial Delayed Blowback?

Published on July 29, 2020
Duration: 6:08

This video from CMMG explains the technical differences between their patented radial delayed blowback operating system and traditional straight blowback systems. It details how radial delay uses bolt rotation to slow cycling, reducing felt recoil and wear, while traditional blowback relies on heavy components. The instructor highlights key component differences in bolts and upper receivers, emphasizing the tunability of the radial delayed system for various ammunition and suppressed use.

Quick Summary

CMMG's radial delayed blowback system uses bolt rotation to slow cycling, reducing felt recoil and component wear compared to traditional blowback which relies on heavy bolts and buffers. This patented system allows for a smoother shooting experience and improved control, making firearms more approachable for new shooters.

Chapters

  1. 00:00Introduction to Radial Delayed Blowback
  2. 00:35What is Traditional Blowback?
  3. 00:59What is Radial Delayed Blowback?
  4. 02:11Benefits of Radial Delayed Blowback
  5. 03:03Component Differences: Bolts
  6. 03:42Component Differences: Uppers
  7. 04:03Traditional Blowback Bolt and Lower Components
  8. 04:40Radial Delayed Blowback vs. Traditional Blowback Summary
  9. 05:14Key Takeaways: Radial vs. Traditional
  10. 05:23Component Compatibility Warning
  11. 05:46Conclusion and Further Resources

Frequently Asked Questions

What is the main advantage of CMMG's radial delayed blowback system?

The primary advantage of CMMG's radial delayed blowback system is its ability to significantly reduce felt recoil and slow down bolt speeds. This is achieved through a patented mechanism that requires the bolt to rotate before cycling, allowing chamber pressures to drop safely and resulting in a smoother shooting experience and less wear on components.

How does radial delayed blowback differ from traditional blowback in firearms?

Traditional blowback relies on the heavy weight of the bolt and buffer to manage recoil and cycling speed. In contrast, radial delayed blowback uses a unique bolt rotation mechanism to slow the action, achieving safe cycling with lighter components and resulting in less felt recoil and improved shooter control.

What are the key visual differences between a radial delayed blowback bolt and a traditional AR-15 bolt?

A radial delayed blowback bolt features chamfered lugs on the rear, a distinct cam path, and a built-in ejector. It also has a component that looks like a gas key but functions differently. Traditional AR-15 bolts are simpler in comparison, and traditional blowback bolts are typically one-piece and heavier.

Can components from a traditional blowback system be used with a radial delayed blowback upper receiver?

Generally, components are not interchangeable. While some modifications might allow for limited compatibility, CMMG advises proceeding with caution. Specifically, a radial delayed blowback bolt requires a radial delayed blowback barrel to function correctly, as they are designed as a matched system.

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