"What's grandma doing walking the streets with a loaded gun?"

It's no secret that New York City has some of the nation's strictest gun control laws. But there are a lucky few residents permitted to exercise their 2nd Amendment rights. Harlem grandmother Margaret Johnson is one of them:

This pistol-packing granny, who shot a man she accused of mugging her in her wheelchair, wishes she had finished the job—because now, he's suing her for millions.

"I'm a peaceful person. I wish that I had killed him," said Margaret Johnson, 59, whose grandfather, Ellsworth "Bumpy" Johnson, once ruled Harlem's underworld and was immortalized in several hit movies….

Johnson and her landlord, the Lenox Terrace apartment complex, are being sued for $5 million by Deron Johnson, 48, a man with a lengthy rap sheet.

Margaret Johnson, a retired city bus driver who has a dislocated hip and a ruptured disc, said that in September 2006, she was sitting in her motorized wheelchair at Lenox Avenue and 133rd Street when Johnson tried to snatch her purse and gold chain.

She pulled out her licensed .357 Magnum and fired a round into his left elbow. Cops grabbed him moments later.

Whole New York Post story here.