User blog comment:Rozh/Surface-to-Orbit Artillery/@comment-131756-20110321005343

I would like to point out something that comes to my mind when discussing a ground-based MAC gun. We've discussed in the past just how powerful MAC's are: if a full-powered MAC was fired at a planet's surface, it would crack the crust and cause mass destruction, with numerous side effects. So, I'm curious, how would such a gun disperse the recoil on such a gun? I'm by no means an expert on the precise physics of the MAC, but if the gun has a recoil, would it not be quite large?