Police have raided a fortified Belmont home, seizing drugs, cash and several firearms, including a submachine gun, hidden in concealed areas throughout the house.
Officers took several hours to examine the entire house after launching the raid last Friday morning.
Most of the seized items were allegedly found in a hidden basement.
Officers from the gang crime squad and dog squad were involved in the raid on the Williamson Avenue house.
Gang crime squad officers are investigating the man's links with the Mongols outlaw motorcycle gang.
The owner had installed a fortified front door and there were several purpose-built concealed storage places throughout the home.
The entrance to the basement had been disguised within the floor of the living room, police said.
Among the items seized in the raid were eight semi automatic pistols including one fitted with a silencer, seven rifles including a Thompson submachine gun and an SKS military assault rifle, numerous gun parts, thousands of rounds of ammunition, 2.1kg of methylamphetamine, 60grams of MDMA (Ecstasy) and $340,000 in cash.
The proceeds of crime squad are investigating the man’s interest in five metropolitan and regional properties.
A 37-year-old Belmont man has been charged with intent to sell or supply and is next due to appear in the Perth Magistrates Court tomorrow.
Gang crime squad officers are continuing their investigation into the man's links with the Mongols outlaw motorcycle gang.