This manual provides technical information, training techniques, and guidance on the M249 light machine gun in the automatic rifle role, which was formerly known as the squad automatic weapon (SAW). Since this manual addresses the M249's use in the automatic rifle role as opposed to the light machine gun role, it is referred to in this manual as the M249 AR. Unit leaders and the designated automatic riflemen will find this information invaluable in their efforts to successfully integrate this automatic weapon into their combat operations.