JEFFERSON CITY, Mo. — Missouri Republican gubernatorial candidate Eric Greitens is selling so-called "ISIS hunting permits" to raise money.

Greitens' campaign distributed an email Wednesday promoting bumper stickers with the words "ISIS HUNTING PERMIT 2016." The sticker says it expires when "we defeat this evil."

The campaign is selling the mock hunting tags for a $10 donation. For $100, donors can get stickers signed by a former Navy SEAL who claims he killed Osama bin Laden.

Greitens is a former Navy SEAL officer. He's touting his military background in his campaign for governor.

He faces a competitive four-way Republican primary Aug. 2. Also running are suburban St. Louis businessman John Brunner, former U.S. Attorney and House Speaker Catherine Hanaway and Lt. Gov. Peter Kinder.