I'd go with a pair of Tonfas (Like police batons, only older). Possibly with an edge on the part that wouldn't be on my arm.
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On the left side of the bottom |.
For examples, see Terminator 2, when Linda Hamilton starts breaking out of the asylum.
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Someday someone may kill you with your own gun, but they should have to beat you to death with it because it is empty.
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