you might want to consider buying one of the good manuals on rifle construction. i personally like the Gunmith of Grenville County by Peter Alexander, which is available from Track of the Wolf, and will set you back about forty or forty five dollars. this doesn't mean you're going to actually build one, but it's a great explaination of how these rifles are built and then you will have a better understanding about how they work. once you have the book, of course, you might be tempted to put one together for yourself... look deep into my eyes... you are getting sleepy, very sleepy...