Cool, I'll check that out - thanks. Surfing around I found some generally positive feedback. I'll probably call them later today or tomorrow to confirm their lead times of 4-6 weeks. I still need to get off my butt and order a threaded barrel from Jarvis for it.
I've not used them but they've been around for quite a while. They're sponsors at fivesevenforum.com, you might be able to get some informative feedback there and at fnforum.net.
I'd be interested in hearing how the subsonics perform, I'd like to lose the supersonic crack when shooting suppressed.