IF you do coild gun research online, look up OLD websites, i remember a college student who made a coil gun pistol that had the same muzzle energy as a daisy bb gun or 22 short. maybe just a 22 cb short. it been years....
thing is his gun weighed like 6 pounds, and the battery pack was a surplus alice pack with steel frame, circa 1990. and a 40 lb tractor battery inside. not exactly convenient.
although the 40 pound battery pack would make a nice backup