P90 in a bullet rain

I didn’t start from scratch, but instead took LeCube’s amazingly clean p90 model form blend swap*. And then ruined it :evilgrin:. I intend to do a freeze frame rotation animation for a video intro, but as always, run into issues with particles. For some reason the particles only collide with the base plane, the cage I created as a collistion obstacle doesn’t do anything. There might also be a smarter way to do the base with all the bullets as they are currently another particle system with no gravity.

If I were to set this up for the game engine rigid body dynamics, those would all have to be actual objects, not particles, correct?