Volquartsen will thread and crown the barrel on my Ruger Mark III for
$65 and move the front sight cut back on the barrel for an additional
$30. That's the best price I've found and with a reputable company.
Turnaround time is 10 to 14 days...

I bought the silencer to attach to my AR 15/22, which already has a
threaded barrel, but it would be nice to use it on a pistol, too.