If we are being honest, the Founder's weapons lack magazines. Technically you can still have the firearm no matter the mag cap...
The you tube 'ex-spurt' plays out myths. True many times civilians showed up to fight with their privately owned firearms. These were shotguns and smooth bore muskets (glorified shotguns when it comes to accuracy) Time after time these civilians were driven from the field by British Regulars. 18th century warfare had the two sides packed shoulder to shoulder so the volley of round balls has a chance to hit. The range was very close. Professional troops fixed bayonets and charged. The militia (if it can be called that) lacked this essential feature so receiving the bayonet charge was fatal. Many times the militia fled before the British troops could close.
Not until the militias were STATE organized and issued MILITARY arms did the civilians begin to hold their own- training would be an issue till the very end.
The myth weavers like to pretend owning a military style weapon protects the citizenry from dictators, but fact is owning vs being able to stand up to intense combat and fire fights. There is a bit more to surviving a modern fire fight (much less winning) than firearm ownership and watching John Wayne war movies. Though I did get a chuckle out of very essential element of an 18th century weapon- the bayonet lug- being 'E-Vile', it would be extraordinary for anyone to be bayonetted in modern warfare.
Even with State (and local town) militia organizations the war record for militias is spotty at best. Google the Bladensburg races. I'd opine the Founding Fathers didn't fear their own government-they WERE the government and had to put down several revolts. Today our privately owned firearms are not for resisting the gubmint or invaders. They are for self defense from common criminals (ok some uncommon ones too)- you don't need 30 rounds, a 3 position selector switch, or for that matter a bayonet lug.
Oh ok, keep the lug...

eace