"It feels like a bazooka — and sounds like a cannon," the New York Daily News' Gersh Kuntzman said in an article published Tuesday. "The explosions — loud like a bomb — gave me a temporary case of PTSD. For at least an hour after firing the gun just a few times, I was anxious and irritable."
You're thinking of Kuntzman, Gersh Kuntzman:
https://www.washingtonexaminer.com/new-york-daily-news-journalist-firing-an-ar-15-gave-me-ptsd