Further charges against the four men are likely to be laid in the next few weeks.
Four houses in Hawke's Bay and one property in Auckland were searched by police yesterday. Nine ounces of methamphetamine were found in Auckland and three in Hawke's Bay.
Head of the Eastern District Organised Crime group Detective Senior Sergeant Mike Foster said the operation was the second significant methamphetamine bust for the area in recent months.
"We identified the Auckland supplier and he is now out of operation. We have been working with Auckland police who executed a search warrant north of Auckland yesterday where they found the offender as well as thousands of dollars in cash, a large amount of methamphetamine and a loaded pistol," Mr Foster said.
Methamphetamine, a large amount of cash, LSD and a boat were seized in Hawke's Bay.
Mr Foster said there were gang connections to the group and further arrests were likely.
"These people have been very active around Hawke's Bay for some time now and we believe over the past 2-3 months we have made a big dent in the supply of methamphetamine in Hawke's Bay."