A nice enough fellow showed up at one of our pigeon shoots sporting a new matched pair of single trigger DeHaans. He paid a hundreds of dollars entry fee. The first bird out, his gun misfired the second shot. It happened again, so he switched to the second gun. The second gun wouldn't work, either. I'm not sure what happened to him for the rest of the shoot, but he wasn't winning any money. He was too hard to watch for anyone to know what happened to him for the rest of the day. I am mystified that the guns were not tested at the factory.