Three cops stopped a car with illegally tinted windows in Brooklyn and found more than they bargained for — a trove of weapons and ammo that included a machine gun, authorities said.

The anti-crime officers pulled over the red 2013 Chevy Impala near Ralph Avenue and Bainbridge Street in Bedford-Stuyvesant around 5 p.m., Wednesday, after noticing the excessive tints, police said.

When the driver, 36-year-old Harvey McManus, said he didn’t have any paperwork for the vehicle, the cops asked him to step out of the car.

As McManus was getting out, one of the eagle-eyed officers spotted a large knife sitting on the driver’s side floor, authorities said.

A more thorough search of the Chevy turned up a Pioneer Arms 9mm machine gun, two stun guns, and an assortment of ammunition.

McManus, who lives on nearby Chauncey Street, was hit with a slew of charges including weapons possession and a violation for the tint.

Officers Ryan Galvin, Mark Xylas, and Vaughan Ettienne were credited with the bust, police said.