Sen. Hillary Clinton’s mailing attacking Sen. Barack Obama’s record on guns appears to include a striking visual gaffe: The image of the gun pictured on the face of the mailing is reversed, making it a nonexistent left-handed model of the Mauser 66 rifle…“The gun in the photo does not exist,” said Val Forgett III, president of Navy Arms. “I find it laughable on its face. It’s like a picture of Babe Ruth hitting right-handed.”