I have never seen or heard of better shop manuals than the ones by Jerry Kuhnhausen.
Available lots of places, direct source is:www.gunbooks.com/index.html
If you own a firearm that is covered by these books, and you do any of your own work, you can find NO better manuals anywhere.
Please note that the AR15 manual has been in the works for some time. I predict it will become a must-have for AR owner/builders.
Disclaimer: I have no financial interest in any of this.