I'm thinking it's irrelevant.
When it comes to that, guns in the hands of private citizens will be worthless.
What has the US done in Iraq and Afghanistan? One shot, no one knows what the target may have been, and hordes of US military are kicking down doors and arresting anyone in sight.
Have one of your militia take a shot at a convoy and see how his neighbors like the retaliation.
It's sort of like a hijacking. The hijackers kill someone, anyone, right off to demonstrate that your life has become worthless and any resistance will be met with lethal force. Immediately.