Stainless steel peel washer for 1/2 x 28 threaded barrels. For use on your AR15 barrels (or other firearms) with a 1/2" threaded barrel. Needed for proper indexing of muzzle devices. These are .067" thick with .003" lamination’s.
The best way to mount a muzzle device on a precision barrel. Crush washers and jam nuts require torque levels that have been shown to affect POI and group size.