4 responsible for gun check

A location manager for “Rust” says at least four people were responsible for checking the gun that killed cinematographer Halyna Hutchins — including Alec Baldwin himself.

“A massive mistake was made,” Stacey Mickey-Evans told the Australian radio station 92.5 Triple M Gold Coast on Sunday.

“There are massive protocols to stop these things from happening. There are multiple checks for it.”

She said the armorer, assistant director and key grip were supposed to “check the gun . . . no matter what’s going on on set.”

“And then, very lastly, the actor checks the gun,” she added.

“So there are four to five people in this stage,” she said, but “somehow, there was a failure.”

Mickey-Evans said she found it “difficult to talk” about Thursday’s “terrifying” tragedy, in which Baldwin fired the prop gun on set, killing Hutchins, 42, and wounding director Joel Souza, 48.

The shooting left blood splattered on Baldwin, who changed out of the Western outfit he was wearing and into street clothing before talking to investigators, according to law-enforcement documents released on Sunday.

His clothes were taken by investigators as evidence.

“This was obviously a real weapon, and this particular weapon was supposed to be loaded with blanks,” Mickey-Evans told the radio station’s “Bridge, Spida & Flan” show.

“That is what everyone thought, that it was checked and double-checked and triplechecked . . . supposedly.

“That obviously didn’t happen,” she said.

“Somewhere along the lines, it fell through the cracks.”