I got one of those bolts from them. I keep it with my match gear for when I shoot my 03a3 at a service rifle match as a "fast fix" If my bolt goes down because of a broke firing pin or extractor, I'm back in bidness in seconds instead of going home early.
The Bolt was as good as any I've ever seen. It probably didn't need it but I did replace the firing pin spring with a wolff because it felt kinda soft compared to the one in my 03a3.
Before you ask...I did check the headspace with both bolts. The new bolt matched up the headspace almost exactly as the current one