There was some behind the scenes stuff about him failing to fill orders and essentially disappearing off the face of the earth with a lot of people's money, so I can't say it's surprising.
I'm not privy to the details but I know Hank Greenberg, who is a representative of Microtech and a big personality in the knife collecting world, mentioned it to Warren on his facebook. Depending on who you believe, Quartermaster says he took $8,000 from them to make them parts for the Mr. Roper and never followed through.