User blog comment:Rozh/Surface-to-Orbit Artillery/@comment-131756-20110321005343/@comment-795387-20110418043146

My friend once told me about how he and his friend once made a man-portable, semiautomatic, coilgun-based electromagnetic rifle. When connected to a car battery, it could accelerate a 50 gram iron slug to supersonic velocities. Said slug could penetrate straight through a four-by-four wooden beam, without any recoil