A Republican congressional candidate in Georgia says in a new ad that he's prepared to take up arms to effect change in Washington.

Former congressional aide John Stone begins the ad by firing a cannon he says is like the one his forefathers used in the Revolutionary War.

"As the only licensed firearms dealer in America running for Congress, I'm willing to do the same if we have to," Stone says. "But it's a whole lot easier just to vote in new House Republican leaders who will stand up to Obama and defend our Constitution."

Stone is running in a crowded primary seeking a rematch after losing badly to Rep. John Barrow (D-Ga.) in 2008. He has staked his campaign on opposition to GOP leadership, including House Speaker John Boehner (R-Ohio).

On his Web site, Stone features a graphic in which Boehner is being swept away.