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Tap, rack, bang (TRB) or Tap, rack and go is jargon for the response to a failure to fire in a firearm with a removable magazine. This is designed as an unhesitating "Immediate Action" and involves no investigation of the cause,(due to the reason for being under fire in a combat or defensive situation) ; but is effective for common failures, such as defective ammunition or improperly seated magazines.
- Tap - to tap the magazine. This is to ensure that the magazine is properly/completely inserted in the firearm so that it feeds properly. As typically taught in tactical firearms courses, the "tap" is considerably more than a tap, and in the case of a semiautomatic pistol is usually accomplished by slamming the gun hard into the palm of the other hand, magazine end down.
- Rack - pull back sharply and then quickly release the action/slide of the firearm. This will eject a misfired round, which could be a possible cause of the stoppage, and also chamber the next round.
- Bang/Go - aiming and firing the firearm again. If the firearm again doesn't fire or fails to extract the spent round, it may indicate a more serious problem with the firearm requiring maintenance. For instance, if the firing pin is too lightly striking the primer on a cartridge, it may indicate a worn out spring or firing pin.
Some failures, such as a "stovepipe", require more complicated maintenance or attention from a gunsmith; and with others, such as a squib load the "tap rack procedure" should never be used.
Video Tap rack bang
References
Source of the article : Wikipedia
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