User blog comment:Rozh/Surface-to-Orbit Artillery/@comment-131756-20110321005343/@comment-923138-20110321013640

I'm not sure about too massive a recoil, given that the structure of a MAC relies on the projectile being sped up after its been fired, so the initial firing blast should be rather small. But then again, while it works just fine for something small like an Onager, the recoil should be much greater anyway for something the size of a ground MAC.