Narre Warren Police members located a drug affected man unconscious in the driver seat of a car, whilst it was still running in Narre Warren South.
A search of the vehicle was conducted and a firearm, ammunition, illicit drugs and cash was located.
The man was arrested at the scene.
Casey Crime Investigation Unit members charged him with theft of motor vehicle, possessing a firearm, cartridge ammunition, and methylamphetamine, as well as committing indictable offence whilst on bail and other offences relating to the incident.
The 30-year-old Ringwood man was remanded to appear at Melbourne Magistrates’ Court on Monday 21 February.