Madly searching the net for dimensions for bolt carriers and bolts in the AR platforms (AR10, AR15) in calibers .223, .308, 9mm and .45. I have a big piece of stainless bar that needs to become a few of these. Does anyone have either a link or a copy of the dimensions or blueprints for the AR15 bolt and/or carrier in ANY of these calibers?? Any help is appreciated. Thanks, and have a VERY HAPPY HOLIDAYS!!