Why You SHOULDN'T Use Crush Washers on QD Muzzle Devices

Published on May 2, 2025
Duration: 6:01

This guide explains why crush washers are unsuitable for QD muzzle devices and recommends using shims for proper alignment and to prevent suppressor damage. It details the process of installing a QD muzzle device with shims, emphasizing the importance of correct timing to avoid baffle strikes and ensure suppressor longevity. The video also briefly touches on alternatives like jam nuts and specialized systems.

Quick Summary

Avoid using crush washers on QD muzzle devices as they can cause the device to get stuck inside your suppressor, leading to potential baffle strikes and damage. Instead, use shims for precise alignment, which is crucial for suppressor longevity and firearm accuracy.

Frequently Asked Questions

Why should I not use crush washers on QD muzzle devices?

Crush washers deform when tightened, creating friction. This deformation can cause QD muzzle devices to become stuck inside suppressors, leading to difficult removal and potential damage like baffle strikes. Shims are recommended for precise alignment instead.

What are the risks of using a misaligned muzzle device on a suppressor?

A misaligned muzzle device can cause baffle strikes, where the bullet hits the internal baffles of the suppressor. This is a catastrophic failure that can require expensive warranty service or render the suppressor unusable.

What is the correct way to install a QD muzzle device?

For QD muzzle devices, it's recommended to use shims instead of crush washers. Shims act as precise spacers to ensure proper alignment. The process involves hand-tightening the device to check alignment, selecting the correct shim(s) based on instructions, installing them, and then fully tightening the muzzle device.

What are shims and how do they differ from crush washers?

Shims are thin, flat metal pieces used as spacers to achieve precise alignment for muzzle devices. Unlike crush washers, which deform and create friction, shims maintain their shape and are designed to provide controlled positioning for QD muzzle devices.

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