Former Demo candidate uses assault rifle
Former Democratic congressional candidate Paul Hackett used an AR-15 to hold three men after their car crashed into his fence. There's a bit of an investigation since this would be threat of deadly force to apprehend people who'd committed misdemeanors.
Amusingly, the Huffington Post carries the story favorably, as "Fmr. Political Candidate Hackett Subdues Three Men With Assault Rifle: "I Had Done This About 200 Times In Iraq"."
It's amusing, since the Huffington Post's regular columnists include Paul Helmke, head of the Brady Center, and Josh Sugarman, head of Violence Policy Center, which should tell you their general orientation as to "assault rifles" and use of force by civilians.