The problem is that when that was written, the only "arms" available to the people was a single-shot musket. Now, Thomas Jefferson was smart, but even he couldn't have envisioned the development of the assault rifle, nor would he have been in favor of random people having access to these tools of mass destruction.
So if you support reasonable gun control laws, then NOW is the time to show your support for President Obama and Vice President Biden's agenda. It IS reasonable.
Do something....NOW.