I got this bolt I think at the 2003 Knob Creek show. Vendor had a bunch of IMI UZI parts. It was the same guy I got a full auto .40SW closed bolt from. He didn't know what he had back then. I don't think I have ever seen one of these bolts ever for sale. Yes .45 Open bolts were common but not .45 full auto closed bolts. I like my full size UZI's running around 600 RPM. This was more of a novelty and something nice to have as a collector but I have only shot it once in over 20 years. I shot it again yesterday just so I could get some video and documentation. I probably won't ever shoot it again.