Paul wants a revolution, in honor of John

HAPPINESS IS a cold gun.

That was the message from Paul McCartney, who recalled the murder of his former bandmate to emphasize his personal stake in the local gathering of March for Our Lives on Central Park West.

The 75-year-old former Beatle stopped near The Dakota on W. 72nd St., where John Lennon was gunned down nearly 40 years ago.

“One of my best friends was killed in gun violence right around here,” he told CNN. “So, it’s important to me.”

The aging rocker held open his jacket to allow the cable news interviewer to see his shirt, which said, “We can end gun violence.”

McCartney and his wife, Nancy Shevell (both below), joined an estimated 20,000 at the Manhattan demonstration, hoping the attention that he brings to the issue will create change.

“This is what we can do,” he said to CNN. “So, I’m here to do it.”

Lennon was fatally shot four times on Dec. 8, 1980 in front to the exclusive Upper West Side apartment building by Mark David Chapman, a mentally ill fan. The gunman pleaded guilty. He was sentenced to 20 years to life.

The New York State Parole Board denied Chapman’s release in 2016, but he’s eligible again this year.

Anti-gun demonstrators also gathered across the street in Central Park’s Strawberry Fields, the 2.5-acre lot dedicated to Lennon for his contribution to music, culture and peace.

The march was just one of many across the country, including in Parkland, Fla., where a gunman entered Marjory Stoneman Douglas High School, killing 17 on Feb. 14. The main gun-control rally was held in Washington, D.C., outside of the Capitol.

Fellow celebrities have joined in on the various marches, including Kim and Kayne West, Jennifer Hudson, Steven Spielberg, Jimmy Fallon and George and Amal Clooney.

Demi Lovato, Lin-Manuel Miranda, Miley Cyrus and Vic Mensa were some of the many performers who took the stage at the D.C. march.