Wondering if any members have found a shim kit that works on Accuracy International muzzles? Outside diameter is .873, inside needs to fit over M18 x 1.5 threads (little bigger than a 5/8 x 24 thread). I am going to RockSet a AWC Thor PSR muzzle brake on a .300 win mag and need to time the brake. From there I am intending on using a Thor PSR Ti suppressor I am also using on a .338 Surgeon rifle. Brownell's has a shim kit but does not provide an inner dimension for the shims. Thanks for your help.