Anyone out there own one in 9mm? How would it do for someone with small hands?

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SWCA 3417 HF 642 NRA-TC

I have one. It's a good alternative for those that don't like the Glock grip angle.
It's a bit heavier than a Glock nineteen, and feels "chunky" to me.
They make different grip modules for the 320 series, so hand size shouldn't be a problem.

And the US Military says it's gooder than the rest (read-cheaper), so there's that....

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Because of the metric system?

Greetings! I have a P320 Xcompact with a medium (standard) grip module. Even though I have hands that take medium/large gloves, I find myself shooting a P365 more frequently than the P320 Xcompact. I am doing this more because of recurring carpal tunnel syndrome.

The best that I'd be comfortable suggesting, is trying to locate a small and a medium grip module and trying them for yourself.

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Judge control not gun control!

Look at the Sig 365 series. I have the Macro and really like it. The Macro has three backstraps to choose from.