It really is sad to me the company is making the consumer prove it's unsafe. The obvious heat affected zone on the bolt should be the give away and the difference in hardness of the metal at the weld/grind, HAZ, and rest of the bolt would interesting. It has me curious about Germanicon proofing practices though - are they really just concerned with it surviving one proof shot and not overall craftsmanship? It wouldn't be shocking given the existence of Rohm revolvers. To me it's like me using Bondo or sheet metal screws to hold a rusty frame rail together; sure it will work for a little while but do you really want to be in that car in the event of a wreck or drive it for another 10,000 miles and hope it holds?