Originally, for a split second, I thought about arming Rocksteady with a huge, over-the-top X-Men/Cable kind of weapon, but I quickly decided that an Uzi was more his style. He's definitely an automatic weapon kind of rhino. However, the Uzi was too similar to his head in both size and shape, so I decided a longer rifle would break up the composition better. The version on the right also has on a helmet, but I haven't decided if I like it enough to keep it yet. It goes with the rest of his get-up, but I think it makes him look less menacing, more stupid (but then, that stays true to his character, I suppose).
