https://precisionarmament.com/accu-w...gnment-system/

they should never be used on any baffle style muzzle device where the clearance hole is only slightly larger than the bullet


I stick with regular shims for anything that may ever seen suppressor use. Even if I don't own the can for a particular mount, if it is a mount for a can, its getting a shim. Above, I think the position of Precision Armament is pretty clear, there washers are not recommended for suppressor use.