[familyop]

If legal in your jurisdiction, a push dirk will work.

[nicollo]

If legal in your jurisdiction, a push dirk will work.

I live in Arlington, VA, so EVERYTHING is illegal -- except idiocy.

[deport]

Push Dirk

Had to look that up as I'd never heard that before.
Push dagger - Wikipedia
https://en.wikipedia.org/wiki/Push_dagger
Push Dagger. A push dagger (alternately known as: push knife, gimlet knife, fist
knife, Stoßdolch (German), push dirk, T-handled knife or punch dagger) is a short-
bladed dagger with a "T" handle designed to be grasped in the hand so that the blade
protrudes from the front of one's fist, typically between the index and middle ...