West Coast police have been cracking down on drug crime in the region over the past month, arresting a number of people.
A Hell's Angels gang member was in possession of methamphetamine with a street value of more than $500,000 when he was arrested in Kumara last Friday.
The 48-year-old Auckland patched member was also armed with a pistol, had ammunition and had cash in his possession when he was arrested.
Meanwhile, three people were arrested and charged with supplying methamphetamine after West Coast police conducted a number of search warrants yesterday.
Two women, aged 33 and 36, and a 34-year-old man appeared in Greymouth District Court on methamphetamine charges yesterday.