Is a fist considered a weapon?

Answer 1

Well if you can hurt someone with it then if you cause GBH (grevious bodily harm) or ABH (actual bodily harm) that could jail you.

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Additional Answer:

To answer this question from a legal standpoint, it may help to consider why a using weapon matters at all. Generally, the use of a weapon makes the underlying crime more serious -- often elevating a misdemeanor to a felony. For example, intentionally causing a harmful or offensive contact with someone is battery and could be a misdemeanor; using a weapon is likely to make it aggravated battery, which is a felony.

Hands and feet are not ordinarily considered weapons, but they can be if they are used in a manner that is likely to have the same effect as a weapon -- that is, to cause great bodily injury or death. The court will probably look at all the circumstances, including the intention of the accused and the type of injuries sustained, to decide whether the crime is more serious than a "simple" battery or assault.

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Also: In many jurisdictions the fist can be considered a weapon if the perpetrator of the assault is trained in the use of their hands (e.g.: Martial Arts instructor or high-ranking 'belt' - a professional boxer or wrestler - military trained and skilled in the art of hand-to-hand combat (i.e.: Navy Seal or Army Ranger) - etc) it is conceivable that the charge could be enhanced to reflect this ability to inflict pain, injury or death by their use.