How many objects are there which would not be protected by a maximally-interpreted Second Amendment? Distilled alcohol may of course be used to make firebombs (surely firebombs predat Molotov). Most objects could be used to strike people. Making water into a striking weapon would have taken a few months (wait for winter) but it could certainly have been used as a weapon once frozen. Even a bag full of wet noodles could have been used as a weapon by stuffing the noodles quickly into the victim's mouth so as to cause choking.
Yes. My point was that it shouldn't be or isn't necessary for an object to be designated a weapon in order for the right of the people to keep an bear that object not to be infringed. That in part, is what the 9th and 10th amendments essentially say.