Wikpedia.org has the 411 on this Swedish Bofors 57mm gun. I’d just like to add that it looks like a lot of fun. I mean, if they’re not just having fun, why are they shooting water jugs? I wonder how much a round costs, too. Not the smart rounds of the MK2. Basic plinking ammo. One more thing: do my Second Amendment protected gun rights extend to this bad boy? Answers below, in case I win the Powerball.