Quick Tip: How to Change a muzzle device on an AR style rifle.

Published on July 27, 2016
Duration: 2:01

This guide details the process of changing a muzzle device on an AR-style rifle, as demonstrated by Brownells. It emphasizes the importance of using a vice block to protect the receiver and correctly timing the new device using a crush washer. The entire process is estimated to take about five minutes with the right tools.

Quick Summary

Changing an AR-style rifle muzzle device takes about 5 minutes using an armorer's wrench, vice block, and bench vice. Ensure the firearm is unloaded. Remove the old device, discard the crush washer, install a new one with the bevel facing forward, and thread on the new device. Tighten with the wrench, timing the closed section to the 6 o'clock position to minimize dust signature.

Chapters

  1. 00:00Preparation and Safety
  2. 00:34Removing the Old Muzzle Device
  3. 00:51Crush Washer Replacement
  4. 01:06Installing and Timing the New Device
  5. 01:31Conclusion and Support

Frequently Asked Questions

What tools are needed to change an AR-style rifle muzzle device?

You will need an upper receiver vice block, a bench vice, and an armorer's wrench. These tools ensure the rifle is securely held and allow for proper torque application without damaging the receiver.

How do you properly time a muzzle device on an AR-15?

Timing involves orienting the muzzle device so its closed section is at the 6 o'clock position. This is achieved using a crush washer, which allows for the necessary rotation to align the device correctly after it's tightened.

Can I reuse a crush washer when installing a new muzzle device?

No, crush washers are single-use items. They deform during installation to create a seal and allow for precise timing. Always use a new crush washer for each muzzle device installation.

Why is it important to use a vice block when changing a muzzle device?

Using an upper receiver vice block reinforces the upper receiver's locking lugs within the vice. This prevents stress and potential damage to the receiver when applying the significant torque required to remove or install muzzle devices.

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