An accurate summary overall, but to make things clear “well-regulated” in the original text simply means properly drilled and trained (usually by a career soldier like a sergeant), not only in the use and maintenance of firearms but also unit tactics and discipline.
Put another way, the Framers most assuredly did not want members of the citizens’ militias described in the Second Amendment to be undisciplined lone-wolves taking potshots at perceived enemies just because they owned their own rifle or pistol. They understood that guerilla tactics only got them so far in the Revolutionary War against the Redcoats, and that what won it was an army that was operating in good working order (“regulated”).
