Six pint-sized perps – two of them only 13 – were busted in a violent knifepoint robbery of a straphanger inside a Midtown subway station early Tuesday, cops and sources said.
The three boys and three girls approached the 35-year-old victim, a stranger, on the N/R/W train platform at Fifth Avenue/59th Street around 3:15 a.m., according to authorities and sources.
One of the boys flashed a knife before grabbing the victim’s iPhone and a bag of clothes he’d been carrying, cops said…