The truck was left unoccupied on a Fordham street corner with its engine running on July 30th.
The suspect drove it a few blocks, crammed $419,000 into a bag, and walked toward a getaway car.
Rapid Armor Corporation has been hit in the last three armored truck heists in the city.
Most recently, they were hit last month in Canarsie when half a million dollars was stolen.
So far, there are no arrests.