Geissele Automatics Reaction Rod

Published on June 12, 2017
Duration: 6:46

This video demonstrates the use of the Geissele Automatics Reaction Rod for AR-15 upper receiver work, specifically focusing on muzzle device installation. The rod locks into the barrel's star chamber, preventing torque from damaging the aluminum upper receiver. It highlights the proper installation of a muzzle device using a crush washer, emphasizing the importance of the washer's orientation and the need to smash it for a secure fit.

Quick Summary

The Geissele Automatics Reaction Rod protects your AR-15 upper receiver by locking directly into the barrel's star chamber, preventing torque damage during muzzle device or barrel work. Unlike older methods using pins in aluminum blocks, this solid metal rod ensures all stress is on the barrel, making installations safer and quicker.

Chapters

  1. 00:08Introduction to Geissele Reaction Rod
  2. 00:17Background: FFL 07 and AR Builds
  3. 00:48Problem with Standard Receiver Blocks
  4. 01:24Geissele Reaction Rod Solution
  5. 01:31Reaction Rod Design and Features
  6. 01:55Mounting Upper Receiver to Rod
  7. 02:12Comparison: Reaction Rod vs. Old Method
  8. 02:37Demonstration: Muzzle Device Installation
  9. 03:15Crush Washer Installation
  10. 03:29Installing Battle Comp 1.0
  11. 03:44Torquing Muzzle Device with Reaction Rod
  12. 04:01Timing the Muzzle Device
  13. 04:26Additional Uses for Reaction Rod
  14. 04:36Caution: Accessory Placement on Rail
  15. 05:28Benefits of the Reaction Rod
  16. 05:49Price and Availability
  17. 06:01Recommendation for Builders
  18. 06:13AR Building as 'Legos for Adults'
  19. 06:29Conclusion and Outro

Frequently Asked Questions

What is the primary benefit of using the Geissele Automatics Reaction Rod?

The Geissele Reaction Rod's primary benefit is its ability to lock directly into the barrel's star chamber. This prevents torque from being transferred to the aluminum upper receiver when installing or removing muzzle devices, gas blocks, or handguards, thus protecting the receiver from damage.

How does the Geissele Reaction Rod differ from traditional receiver vise blocks?

Unlike traditional receiver vise blocks that use pins to secure the upper receiver, the Geissele Reaction Rod is a solid piece of metal that engages the barrel's star chamber. This direct barrel engagement means all torque is absorbed by the barrel and the rod, not the upper receiver itself.

What is the correct way to install a muzzle device with a crush washer?

To install a muzzle device with a crush washer, first ensure the firearm is unloaded. Then, place the crush washer with its beveled side facing the barrel onto the barrel threads. Thread on the muzzle device, tighten it with a wrench to smash the crush washer, and time it if necessary.

Is the Geissele Reaction Rod recommended for casual AR-15 builders?

Yes, if you plan to build more than one AR-15, the Geissele Reaction Rod is a worthwhile investment. While it's an upfront cost, it significantly simplifies the building process, protects your components, and makes tasks like muzzle device installation much easier and safer.

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