If I was going to do it I would buy a Springfield GI or a Para Ord. I would also buy a book by Jerry Kuhnhausen called the Colt .45 Automatic Volume 1. Quality parts add up in a hurry and before you know it you can have a bundle tied up in one. The big thing is you can say you done it yourself. I would say you might save a $100 or so but that's about all. Good luck if you try it.