MOLON's COLLECTED POSTS - THIS IS A MUST-READ.Molon has compiled an incredible wealth of knowledge around sighting in, shooting for groups, as well as some other topics that are indispensable.
Army TM/FM3-22.9 for the M16A2/ M16A3/ M16A4 and the M4 Series all online - The online Tech Manual to our beloved M16 series weapon and its cousins like the AR15 and similar. Great information on the Aimpoint M68, Elcan M145, Weapon bore sight, PVS 4, 10, 14 and PAS 13 and other "goodies". This is the one manual to have for all phases of training and maintenance. Courtesy of JohnM.