U.S. Army Operator's Manual for M16, M16A1 Rifle
AR-15 Rifle Builder's Manual: An Illustrated, Step-by-Step Guide to Assembling the AR-15 Rifle
U.S. Army M16A2 and M4 Carbine 5.56mm, Rifle Technical Manual
Armorer's Manual AR15/M16/M4 Family of Weapons
PS Magazine: The Best of the Preventive Maintenance Monthly
AR-15 & M-16 5.56mm Handbook
The NEW AR-15 Complete Owner's Guide by Walt Kuleck (2014-05-03)
AR-15 Complete Assembly Guide
AR-15 M-16 Do Everything Manual
The Black Rifle: M16 Retrospective (Modern US Military Small Arms Series- Volume Three)