(KRON) -- A Sebastopol man with a history of drug-related arrests was taken into custody last week after a search warrant uncovered firearms, narcotics and a stolen motorcycle, according to the Sonoma County Sheriff's Office. Michael Silveria, 29, was under investigation by the sheriff’s office for his alleged possession of privately manufactured firearms. On Jan 16, a search warrant was served at his Sebastopol residence on the 4200 block of Bartleson Road. Man arrested in connection with attempted plane theft at Sonoma County Airport A total of six firearms were located and seized in the search, authorities said. According to deputies, one of the firearms was a privately manufactured ghost gun that had a Glock switch installed, making it capable of fully automatic fire. One of the other firearms had been reported stolen out of Sacramento County. (Sonoma County Sheriff's Office) All of the firearms were illegal to possess, the sheriff’s office said, because Silveria is a known addict. A “small amount” of methamphetamine and drug paraphernalia was found in the search warrant. A motorcycle reported stolen from Lake County was also recovered at the residence. Silveria was arrested and booked into the Main Adult Detention Facility on the following charges: Felon in possession of a firearm Possession of a controlled substance while armed Possession of an unregistered firearm Manufacturing of an assault weapon Possession of narcotics with two prior drug convictions Possession of a stolen vehicle Silveria’s bail was set at $0.