I don't know... what parts are you after? I sell blueprints for the AR-15 and M-16 lower receiver and those are the single most critical part (with exception of the Bolt Carrier and barrel extension) plus my AR-15 Resource CD has other drawings and dimensions...
You can buy all three here:
http://quarterbore.com/store/index.html
No, it's not the dimensions of every piece but why would you want that unless you had a manufacturing company and wanted to clone the parts... and even then, it would be easier and cheaper to use the manufactures of the parts in the first place....