A 31-year-old Rebels bikie has been charged with possessing an unlicensed firearm after a traffic stop yesterday.
It will be alleged that officers stopped a vehicle containing two people as it left an address in Marangaroo.
A search of the vehicle found a quantity of methylamphetamine and ammunition.
A search warrant was then executed at the address in Marangaroo, where police allegedly located a hidden semi-automatic pistol.
A 31-year-old man of Marangaroo, who is a member of the Rebels, has been charged with aggravated possession of an unlicensed firearm.
He will appear in Perth Magistrates Court today.
A 29-year-old woman of Yanchep has been charged with possessing methylamphetamine with intent to sell or supply, possessing a smoking implement and wilfully destroying evidence.
She will appear before the Perth Magistrates Court on October 24.