The fourth, a 48-year-old man will also be summoned on unlawful possession of firearms and related charges.
Acting Nelson Bays Area Commander Detective Inspector Paul Borrell said the operation was focused on snaring locals who have some affiliation to criminal gangs.
"We are absolutely committed to exposing and apprehending those in our communities who choose to deal harmful drugs, especially those supplying to our young people."
"The significant physical and social carnage that many of these drugs cause to our communities, especially methamphetamine, is unacceptable.
"We are committed to lessening that harm and holding those responsible to account," he said.
Nelson police are always interested to speak to members of the community who may wish to confidentially pass on information in relation to drug dealing, on (03) 546 3840.
Information can also be provided anonymously via Crimestoppers on 0800 555
111.