M-H doesn't have a website. The pics that Nitro X and I have posted of the Hartemann Weiss singleshots use the Hagn action though. Ralf is a heckuva guy. Sure wish Martin Hagn had been there, but I guess he let's Ralf do most of the traveling these days.

Definitely something you want to look into if you love singleshots. If you attend the SCI shows or ACGG shows, there are several custom rifle makers using the Hagn action. You owe it to yourself to check these out. They are spendy, but I've never picked up another rifle that had so much soul.