My google fu must suck today; either that or google just sucks anymore trying to find any specific information. The more terms I put in to try and narrow the search, the wider the results I get. I've installed these things before, and had a nice print of the specs to turn the muzzle to attach one of these things, but can't find it at present. Mike's web site is no help. Anyone have a link, or a copy of the installation print? Best I can measure, it has a 0.850 minor diameter and something greater than 30 TPI (my gage only goes to 30).