As much as I'd hate to do it, I think I'll have to change that part of the layout just a bit. I put a raised walkway down right after the ramp leading to B, but that sits too high up to effect any shots into B. I tried popping a sliding door down, but that's a temporary fix at best seeing as CTs could just rush the door and pop it open.
Oh wait, I think I got it. I popped down a little side entrance that limits the view just a bit. I'm thinking a few crates or a forklift might block it off just enough.