Look. You want to know what kinetic kill weapons can do in real life? Just take a look at Berringer Crater, aka Meteor Crator, in Arizona. https://en.wikipedia.org/wiki/Meteor_Crater That nice large, deep hole was made by a chunk of iron only 54 yards across. Estimated energy release when it hit? Ten megatons. Of course, throwing rocks THAT large probably violates the Ares Conventions, but it certainly doesn't violate the laws of physics. So yeah, KKW will likely kill mechs. The question is, do you have (or can you build) a railgun/coilgun big enough to give you that sort of yield... If you can (at least in the BT universe), you're going to suddenly have quite a few enemies - and more than a few "friends" who would like it if you shared with them. :drevil: Ed.