I don't know if I'd ask a cop. Two reasons:

Asked out of the blue, it is a strange question.

And a lot of cops, in my experince, are no more gun savvy than they are experts on the law. Some are one or the other, a few are both, but by and large, they do what they are told, and carry what they are issued.
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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.