They certainly look great but why not machine it/them in lead?

I've seen such a beast on a meg and it would appear to offer several advantages. It could be smaller for the weight you want, or heavier for not too much sacrifice in size depending upon your weighting needs. I imagine cost for machining in lead vs. a harder material could be lower, as well. And, wasn't the original handle designed to help with canister impact, say when hitting a wreck or the ceiling of a cave. Lead would make an excellent impact material.

I would be interested in a set (or two) in lead.