"The Black Rifle II" by C.R. Bartocci
Anyone have a copy of this? Just found mine while digging through some old boxes. A must have for any AR lover. It details the whole evolution of the AR. Contains many prototypes, focuses on ARs from every country, and contains a large section of what each marking means. It contains the specs of every type of ammo, the specs of EVERY AR variant, and specs of each individual part in the rifle.
Just thought I'd share, because anyone who wants to do a true replication of a certain AR should check this book out!