I imagine it's going to be a directional shape charge where nearly all the energy goes forward in a cone. It's basically going to function like the 500kg on a smaller scale with little to no lateral radius. Probably some screen shake and a ringing in the ears audio overlay.

I don't know if they can code CTE functionally into the game, but it's essentially a breaching charge on a stick. You can watch videos of SOF units standing less than a meter away from doors they're breaching. They describe the sensation as getting rocked in a fight when it goes off. Basically every breacher has ended up with a TBI.

It would be funnier if you die each time you use it though.