The man who killed Usama bin Laden, former Navy SEAL Rob O'Neill, appeared on "Fox and Friends Weekend" to explain how a one-of-a-kind guitar honors the legacy of "American Sniper" Chris Kyle.

The Chris Kyle Commemorative Les Paul Standard Special guitar will be auctioned off to raise money for a charity that Kyle helped found, Guardian For Heroes, which aims to restore hope, renew spirits and replenish energy for combat veterans transitioning to post-military life.

O'Neill explained that he has an old friend named Tim Montana who's a recording artist in Nashville. Montana teamed up with people at Gibson to create the Les Paul-inspired guitar.

O'Neill revealed that the guitar's design features the skull logo that Kyle's SEAL Team 3 used during tours in Iraq.

"It's really cool. The volume knobs are actually made out of two pieces of spent shells, one out of a .350 Winchester magnum and one from a .338," O'Neill explained.

"It's just a really cool guitar, and they're going to donate it with 100 percent of the proceeds going to Guardian For Heroes."

Watch more from "Fox and Friends Weekend" above.

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