[Hayden120]

I think it's a little too early to be asking for stuff like that, its only been out for less than a month. You could wait a while and buy the 'tactical' version...

 

[NoJoy]

Try http://jarvis-custom.com

I don't think that they have the threaded barrel out yet the the HK45, but they do sell threaded barrels for HKs. e-mail them and see how long it will be.