Becuase they are extremely expensive, not just to purchase but to maintain proficency with, and they are one shot, so if you miss or it can't make it through the clothing, you are out of luck. It just is not a feasible option for most of us.

And AFAIK, every jurisdiction treats it like a firearm for CC purposes.

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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.