Don't want to turn this into a gun debate but generally ARs and their bigger cousins and well most famous guns are infact "designed for war" since, you know, that was kind of the point of all of those aspects you just mentioned. Most guns designed for civlian use are crippled messes designed for "hunting" or sometimes you have weird ones like pocket pistols or ones designed for assasinations but its pretty much; most modern firearms are or were designed for war. And if you really want one to defend yourself, one designed for warfare will be about as effective as any other. Model not withstanding.
And you basically just restated the point I meant on the second one. With some rare exceptions such as weird security loadouts like ceramic-filled hollow points, target rounds and wadcutters, pretty much every gun is designed to inflict maximum damage on a target since, duh, its a gun. If I bought a gun and was told it wasn't designed to inflict maximum damage, I'd go back to the shop and ask for my fucking money back.
Christ, I get it. It was just a mild observational joke. I'm not gassing up my party van to take your guns any time soon.