AR15 book

[saami]

I just picked up an AR15.
Are there any good books on it?

I want to learn more about working on it and
How to swap uppers and lowers around.

[Griggs]

tag for interest. my lower should arrive friday!!!

[saami]

I just got the bushmaster dvd. its great, answered lots of my questions.

[recon]

http://dogbert.abebooks.com/servlet/SearchResults?y=0&tn=ar+15+rifles&x=0