Very cool! I don't know of anything more useful for learning how a particular model of gun works. It's too bad they're so expensive. The cost is understandable, especially when you consider the extra work that goes into the manufacturing however it's definitely a barrier for someone like me who would like to use a cutaway to reinforce what I've learned through books and experience. Ultimately, I'd like to do some gunsmithing on the side as a way to pay for my addiction. Yes, it's true. I'm addicted to filling my gun safe!