The Crush Washer for the AR Platform deforms when the Muzzle Device is tightened to create a seal between the Muzzle Device and Barrel to prevent the Muzzle Device from becoming loose.
The Crush Washer comes in several sizes:
- 1/2" x 28
- 5/8" x 24
The Crush Washer is great for anyone looking to build, repair, or needing just a spare.