Staccato C2 threaded (1/2x28) Drop in Barrel by Jarvis
Not used very much but dropped in without any fitting on my staccato C2, may work with other 2011 style pistols of the same size (if you want to see if it fits first bring your pistol). It has the DLC coating and includes a thread protector.
I paid about $400 after everything was said and done.
Used it with the SilencerCo Spectre 9 and Omega 36m cans, it ran without any issues.