Officers conducted a traffic stop around 3 p.m. in the area of West 8th Street and Mountain Avenue in Upland on Thursday.
They observed that the man was driving in a black Dodge Charger that resembled a police vehicle.
Video from the scene shows the vehicle has blue police-style flashing lights mounted in the windshield and a push bumper mounted in front, as well as several antennas that appeared to be magnetically mounted.
Officers searched the vehicle and say they found a loaded rifle, a shotgun and a handgun. Video also showed the officers looking at what appeared to be a badge and a credential.
The man was placed under arrest and the vehicle was towed.
His name and the exact nature of the charges he is facing were not immediately available.