Sic semper proditores (Thus always to traitors)

OK, all you supposed "Constitutionalists" out there:

1. The Constitution makes it clear that waging war on the US is treason (Article III, Section iii--it's the only crime mentioned in the Constitution!). 18 USC Chapter 115 tells you what laws you are violating and it was passed in accordance with US Constitution Article VI.
2. The Second Amendment does not explicitly repeal any of the main Constitutional provisions relating to treason and insurrection.
3. Just because you don't like it doesn't mean it is unconstitutional.

Dennis v. United States, 341 U.S. 494 (1951) puts paid to the insurrectionist theory:

"The obvious purpose of the statute is to protect existing Government, not from change by peaceable, lawful and constitutional means, but from change by violence, revolution and terrorism. That it is within the power of the Congress to protect the Government of the United States from armed rebellion is a proposition which requires little discussion. Whatever theoretical merit there may be to the argument that there is a “right” to rebellion against dictatorial governments is without force where the existing structure of the government provides for peaceful and orderly change."

Verb sap.