Burbank police say 43-year-old Michael Rodriguez-Cintron, of New York, drove his Camaro up to a wooden gate Friday and plowed through it without stopping.
He was arrested while roaming a back lot of the studio.
No one was injured in the crash.
Lt. John Dilibert said that inside Rodriguez-Cintron's car, police found a duffel bag with several bottles of unidentified flammable material, ignition sources and the replica gun, prompting them to call in the Los Angeles County Sheriff's Department bomb squad to investigate.
Rodriguez-Cintron is scheduled to be arraigned Tuesday.