So, this is what I mean. The 2nd amendment isn't very clear on exactly what ought to be allowed, and exactly what can be regulated. The right to keep and bear arms is clearly not absolute, but it clearly is a right intended for individuals to exercise. Clearly, though, the law can restrict exactly what sort of arms can be kept and borne, and how. This is a view consistent with tradition, with the actual words of the constitution, with statutory law, and with the history of Supreme Court jurisprudence.
In such cases, there ought to be deference to the legislature for exactly where the line ought to be drawn within the wide limits dictated by the constitution. Judge Kavanaugh, though, seems to wish to use his power to further his own agenda, which supports widespread legal possession of all sorts of firearms, and very few restrictions on the manner of their employment. That's all well and good, and I encourage everyone who feels that way to vote for politicians who share their views, but pushing that agenda from the bench is the very definition of "judicial activism".