U.S. Department of Defense 
Sniper and Counter Sniper Tactics – The Official U.S. Army Manual [EPUB ebook] 

Learn how to fight as a sniper and to defend yourself against the enemy sniper – Find out the sniper & counter sniper tactics formulated and used by the U.S. Army. Let professionals teach you how to choose suitable countersniping equipment, select sniper position, observation techniques and how to plan a mission. This e-book will help you improve your riffle marksmanship and field techniques, how to notice typical countersniper situations and react in a split second. Content: Sniper Training: Equipment Marksmanship Field Techniques Mission Preparation Operations Communications Tracking/Countertracking Sniper Sustainment Training Sniper Weapons of the World M21 Sniper Weapon System Counter Sniper Guide: Ammunition Rifles Sights Noise and Muzzle Flash General Notes Trajectory of 222 Cartridge Description of Epoxy Impregnation of Stock Firing Positions Typical Countersniper Situations Suitable Countersniping Equipment