You mean the FN Five seviN or however the like to spell it?

I have seen it but not sure where you would get ammo for it.

I believe its main audience for sale was G-men. Not really meant for civilian hands I think. More to penetrate bullet proof vests, low/no recoil. They really don't push it for regular folks like us. I wouldn't want it for home protection for carry. No knockdown. Just meant to subdue someone.