Self Defense expert and trainer Michael Janich offers some excellent advice on how to employ a knife during a “gun grab” situation. For me, the best part of the advice is this:
Carry a fixed blade
His basis for that recommendation is that if you’re using your knife with your weak hand while attempting to stop a gun grab with your strong hand, your body is going to be hard-locked into “gross motor skills” mode, which means that drawing and deploying a tactical folder could be somewhat difficult. Another excellent option in this scenario would be to use an auto-knife, however those may or may not be legal in your jurisdiction, so check your local laws.
It’s definitely worth reading the whole piece – it’s making me seriously re-evaluate my everyday carry knife, which is a tactical folder and think about moving to a good three inch fixed blade.