So I found out Steam's ultra-janky way of updating C2 and ran the capx. It's very close to what I want as far as the weapon and wall interaction goes.
However, standing on top of a "Wall" leads to screwiness because the "Pick Nearest" is going off that instead of whats in front of the player.
I think what I'm going to end up doing is make some of the early walls thicker and make the wall-piercing a Feature instead of a Bug.
That being said, feel free to contribute if anyone gets a good idea to do what I'm trying to get done.