What was the Lone Gunmen's newspaper called?

The Lone Gunmen’s newspaper was called The Lone Gunman.

The publication was the trio’s investigative news outlet, reflecting their role as conspiracy theorists, government watchdogs, and self-styled journalists. Mulder loyally subscribed to it, and income from subscriptions helped support the group alongside financial backing from people sympathetic to their causes.

The singular title is intentional: the paper is The Lone Gunman, while the three-person group is known as The Lone Gunmen. The name connects both the publication and the characters to the Warren Commission’s conclusion that Lee Harvey Oswald acted alone in the assassination of John F. Kennedy.

A related source of confusion is The Magic Bullet Newsletter, an earlier or alternate reference associated with the publication. “The Truth Ledger,” “The X Report,” and “The Magic Bullet” are not the standard canonical title used for the newspaper in the series’ character background. The accepted answer is therefore The Lone Gunman.