Wow, I kind of want one of those now that I see it in action.
By the way, it's a little known piece of Hollywood trivia that Clint Eastwood originally was going to use one of those LeMat's in 'Pale Rider', but the scene where he swaps out the cylinder to reload took 10 minutes while he wrestled with that retaining pin and unscrewed the barrel, then changed cylinders, then screwed the barrel back on, then had to stop and find a rock to hammer the pin back in...
Just kidding, of course.