From the National Enquirer:

“Blue Bloods” star TOM SELLECK blew up when a lamebrain extra who’d been handed a real pistol for a scene suddenly got trigger-happy and started pointing it at people.

The guy, who was playing a cop but had never held a real gun, recoiled when Selleck — a lifelong gun enthusiast and board member of the National Rifle Association — spotted him and bellowed: “Hey, YOU! What the HELL are you doing? That gun’s NOT a toy stop waving it around!”

Turning bright red as Selleck marched over and got in his face, the nervous doofus quickly lowered the weapon, but the star barked: “Look at you…your finger’s STILL ON THE TRIGGER!”

Besides favoring gun control, I assume Mr. Selleck also supports diversity.