Four people have been charged with drugs offences, following a six-month police operation codenamed Operation Smoke.
The Canterbury Organised Crime Unit ended the operation, which targeted online drug dealers, this week.
Searches were made, based on three warrants, and police seized a gun, methamphetamine, cannabis and cash.
Detective Brad Greenstreet said the harm of drugs on society could not be underestimated.
"This great work by the organised crime unit has disrupted a significant drug supply network in Canterbury.