The rifle is the modern equivalent carried by the Framers' 'well regulated militia'

For decades the federal judiciary has been trying to interpret the Second Amendment out of the Constitution

The courts have never come to terms with the fact that any intelligible reading of the Second Amendment requires an interpretation that acknowledges and reconciles its two clauses. The operative clause speaks of the “right of the people,” while the prefatory clause justifies the operative clause by professing that a “well regulated militia” is “necessary to the security of a free state.”

https://www.washingtontimes.com/news/2017/apr/12/second-amendment-protects-the-assault-rifles/?sf70289044=1