Money, a stolen vehicle and a gun were seized by police as part of a search of the Mongols MC's South Island headquarters.
Detective Inspector Julian Rinckes said police, including members of the Armed Offenders Squad and Police Dog Section, carried out a search warrant at the address on MainRd South, Burnham in Canterbury.
A second search warrant targeting the group was executed by the Christchurch District Organised Crime Group on Rolleston Drive, Rolleston.
"The search warrants targeted a core group that are alleged to be involved in the importation, distribution and manufacture of illicit drugs throughout Christchurch."
"While further searches and arrests cannot be ruled out, so far today police have located and recovered approximately $6,000 cash, a stolen vehicle and a loaded semi-automatic .22 calibre firearm," she said.
One person has been arrested for breach of bail
The man, aged 45, will appear in Christchurch District Court today.
