I am sort of testing the waters out here. I have my pristine Mk III Target Bull Barrel for sale/trade. It has had extensive work to make it extremely accurate and reliable at West Coast Armory including having the bull barrel threaded with a precision cut thread protector that blends absolutely perfectly with the barrel. It has numerous Volquartsen parts including the target sear and extractor. I have also had the magazine disconnect removal bushing added to allow the weapon to fire without the magazine.
(2) magazines included all factory
I can shoot dime sized ragged holes all day from 15 feet.