What part do you not understand? Apparently, all of it.
When the Constitution and the Bill of Rights were promulgated, the “militia” were the people. “Well-regulated” meant being sufficiently trained so that you could load and fire at least three well aimed shots a minute.
The Supreme Court has already ruled on the 2nd Amendment and has supported the right of the people ( citizens of this country)to keep, bear, and carry arms.
Capiche??