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Double tap
A double tap is a shooting technique where two shots are fired in rapid succession at the same target with the same sight picture (different from the controlled pair, where a second sight picture is acquired for the second shot).〔(【引用サイトリンク】title=GunTec Dictionary )〕〔(【引用サイトリンク】title=A Glossary of Terms Relating to Firearms )〕 Instruction and practice of the double-tap improves overall accuracy as shooters often do not have the gun fully extended on the first shot meaning the second of a double-tap is usually the better. The term hammer is sometimes used to describe a double tap in which the firearm's sights are not reacquired by the shooter between shots.〔〔
==History==
The origin of the double tap technique is credited to William Ewart Fairbairn and Eric A. Sykes, British police chiefs working in Shanghai during the 1930s who developed the technique in order to overcome the limitations of full metal jacketed (FMJ) ammunition. FMJ ammunition is commonly used by militaries for feeding reliability, adherence to the Hague Convention regarding non-expanding ammunition, and improved penetration. FMJ rounds can fail to cause sufficient damage, requiring more hits and better shot placement. In Ian Dear’s book ''Sabotage and Subversion'' about British Special Operations Executive (SOE) and United States Office of Strategic Services (OSS) forces, Fairbairn is reported to have instructed SOE personnel in the double tap from 1944 to 1945 at the SOE training school directed by Fairbairn and Sykes near Arisaig in Scotland. The term "double tap" is now used to describe the broader technique of firing two rounds quickly and accurately to disable an opponent. The tactic is still used today by firearms handlers, police tactical teams, military personnel, counter-terrorist combat units, and other Special Operations Forces personnel.
Double taps are an integral part of the El Presidente combat pistol shooting drill developed by Jeff Cooper in the 1970s and published in the January/February 1979 issue of ''American Handgunner''. Also developed by Cooper in the 1970s is the Mozambique Drill or Failure Drill, for a situation where a double-tap to the torso fails to stop an attacker, adding a third shot to the head.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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