“When the 2nd Amendment was enacted, military style rifles is exactly what most people at the time had.”
Some people also owned ships, armed with cannon - and the Founders were not only fine with that, but they put that in the Constitution when listing the powers of the Congress in Article 1, Section 8. Specifically, Congress may issue “Letters of Marque and Reprisal.” What are those? Basically, Congressional authorization to attack and plunder the commercial and military ships of an enemy nation. You weren’t going to attack a British ship of the line, which might have 50 or more cannon, with a rowboat full of musketeers...you NEEDED cannon, and the Founders KNEW THAT. This had been authorized by the Continental Congress, and private citizens with their privately-owned cannon (the closest 18th Century equivalent to a “weapon of mass destruction”) responded and acted.
Oh, and the Kentucky Rifle of the era was SUPERIOR to the “Brown Bess” musket fielded by the British Army...so, yes, you are correct about the “military-style” rifles owned by colonists during the Revolution.
Let’s hope that Ruth “Buzzi” Ginsburg meets the Founders, that Kennedy also retires, and that Trump apppoints 2 Originalist Justices, before this case gets to the Supremes.