free to download.

United States Rifles and Machine Guns, Colvin and Viall:

http://www.archive.org/details/cu31924012809897

This book contains a complete description of the manufacturing processes used for the 1903 rifle.

Or a lap top, the pocket pc's are amazingly cheap.

Later I will add some other links from archive.org for other shooting related topics.  I probably have 100 or more related to machining.  Even though it's stuff that is largely obsolete for current production, there are tons of ideas about fixturing and special tooling that are useful to an amateur with a small shop.  I'm all about stealing using good ideas and I don't care about their age.

The quickest way for you to get started is by going to www.archive.org, then typing a term in the search window.

A good one to start with is "Colvin".  That will dig up Herbert Colvin's text books ranging all across machining topics, mechanism design, and a couple of firearms related books.

Then the obvious "machinist", "fixtures", "lathe", "milling machine", "grinding", and so on.  You'll find enough really good stuff to keep you busy for weeks and weeks.

You'll find redundant copies of some books.  Sometimes they are different editions.  In a couple of cases I've found a higher quality copy.

Some books from Google's service can't be downloaded.  Most can be, but it takes a separate step after the book is displayed in the window.  The link is in the upper right hand corner of the window.  Then use "File / Save a Copy" to save the document to your computer.