I just received my M4-2000 1/2-28 TPI brake, nice piece, I can't wait to shoot it.
I was reading the instructions, yeah I actually read them, and the excerpt below made me curious.
AAC Instructions wrote:
... the ports of the muzzle brake must be oriented at 9 and 3 o-clock. The ideal method of achieving this orientation is to have a depot level armorer machine a stainless steel washer of the proper length that allows the muzzle brake to thread on so that the ports align at 9 and 3 o-clock. ..."
I have a lathe and some machining experience, but how in the hell do you machine a stainless washer that is say 0.035"?
It took 28 lb-ft of torque to perfectly align my brake with a 0.010in shim. Clearly I don't need to turn a custom shim, but I'm curious how it would be done.