U. S. Army, Air Force and Navy Issue Update October 1998 Army TM9-1005-319-1, Air Force TO.11W3-5-5-41, Navy SW 370-BU-OPI-010. This is the current issued government manual on the M4 AR15/M16. This operators manual contains five (5) chapters of must have information to keep your weapon in top working condition. This book discusses in detail: Operating Instructions, Maintenance Instructions, M4 and M5 Adapter Rails and Ammunition. This book is a proven winner for the Armed Forces in keeping the American Rifle the best it can be. We know the book can do the same for you, so orde while supplies lasts. 4 x 5 , softcover, illustrated, 228 pages.