The phrase "well-regulated" in the 2nd amendment referred to well balanced people & things functioning properly as expected in proper working order. It was in common use long before 1789, and remained so for a century thereafter. The following are taken from the Oxford English Dictionary, and bracket in time the writing of the 2nd amendment:
1709: "If a liberal Education has formed in us well-regulated Appetites and worthy Inclinations."
1714: "The practice of all well-regulated courts of justice in the world."
1812: "The equation of time ... is the adjustment of the difference of time as shown by a well-regulated clock and a true sun dial."
1848: "A remissness for which I am sure every well-regulated person will blame the Mayor."
1862: "It appeared to her well-regulated mind, like a clandestine proceeding."
1894: "The newspaper, a never wanting adjunct to every well-regulated American embryo city."
This means no guns for criminals, terrorist, mentally defectives, those who rage out of control.
1709: "If a liberal Education has formed in us well-regulated Appetites and worthy Inclinations."
1714: "The practice of all well-regulated courts of justice in the world."
1812: "The equation of time ... is the adjustment of the difference of time as shown by a well-regulated clock and a true sun dial."
1848: "A remissness for which I am sure every well-regulated person will blame the Mayor."
1862: "It appeared to her well-regulated mind, like a clandestine proceeding."
1894: "The newspaper, a never wanting adjunct to every well-regulated American embryo city."
This means no guns for criminals, terrorist, mentally defectives, those who rage out of control.