I don't have a gun. I'm an European and I even live in a state which wouldn't allow to freely keep and bear arms or to form a militia, so I have only my word - that's my only defense against that what seems to be happening.
I took the hour and a half (because I find the case be really very important for the Americans and the future of freedom) and I was listening thoroughly the whole disputation in the Supreme Court in the case DISTRICT OF COLUMBIA, ET AL v. DICK ANTHONY HELLER.
I guess I have an important note:
They disputed all the words in the 2nd Amendment and many aspects and possible meanings of the words from elsewhere - machine guns, handguns, armor piercing bullets (and various laws and regulations, sometimes apparently irrelevant in the sense when one have to decide the case according to the US Constitution - as the superior law - the US Supreme Court IMHO have no right to contradict in its judgments, nor duty to follow any precedents or laws - except the US Constitution they've the judges taken the oath to defend - as a whole), but they have "forgotten" the main one word - as it would be a big taboo - they absolutely avoided the word free - its meaning in the 2nd Amendment ("A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.")
To explain what I mean, I'll try to describe how I understand the meaning of the 2nd Amendment in the context of the US Constitutional law by my own words (I'll borrow some):
Because there is a constant danger a state, its government, could develop into a tyranny - rendering the state and its constituents unfree - the people's right to keep and bear the arms generally (not just to form the militia) should not be infringed - because the people can defend the freedom only if they are constantly armed and continuously form a real threat of a real power against possible tyrants (foreign or domestic) - to take them down - if needed even by using the armed force - in case the tyrants would infringe, abridge or dissolve their unalienable rights and freedoms, pursuing invariably the same Object evincing a design to reduce them under absolute Despotism.(I'm borrowing this from the 6th sentence of the Declaration of Independence)