The stamp on my SIG 556 Patrol was recently approved and I need to get it cut down to 10".  Is there anyone in the KC area that can do it, and be trusted to cut the new threads concentric to the bore and not otherwise muck anything up?  ADCO use to list the work on the 556 on their website, but it is no longer there (or at least I can't find it).  I've sent them a message about it, but haven't heard back yet.  Plus, I'd rather have the conversion done locally if that is an option.

Thanks!