Director James Gunn owns guns for safety and sporting purposes, but is among the many prominent voices demanding reform following Wednesday's mass shooting at a Florida high school.

The director of Marvel's locally filmed "Guardians of the Galaxy vol. 2" wants the Atlanta-based Centers for Disease Control to study gun violence.

"Honest inquiries into the subject have been SHUT DOWN by government for 22 years. We don't know how to decrease gun violence because we aren't allowed to study it (and, yes, this is due to the gun industry)," he wrote. "We need to outlaw unregistered private sales. We must have at least the same rules around our guns as we do around our cars. Period."

Gunn goes on to pin blame on social media, extremist groups and President Donald Trump and concluded with a challenge: