At least the other man doesn't say something when they're in the middle of moving the slab; that may have been distracting. But the Soldier isn't offended at the initial question. He's heard similar before, though not in a long time.

"Is not armor. It's my arm." Straight to the point, though not directly answering the question about strength. Complicated as his relationship with the hardware is, he's at least accepted the loss of his natural arm. Doesn't remember it, not really, but accepts it.