I have read several posts on HK Pro about him - there is some debate as to whether or not he has an FFL. If he does not - it is illegal to ship a gun to him.
I cannot imagine him doing the trigger work and advertising it WITHOUT an FFL. But, I see this come up often enough that I am starting to wonder.
I was going to send mine off soon - but decided not to unless I see this issue totally debunked.