GRAFTON police found a gun magazine, ammunition and a quantity of cannabis at a Briemba St house on Thursday morning.
Police executed a search warrant on the property and a drug detection dog helped locate the drug, police said.
A male resident of the address will be issued with a court attendance notice.
Car theft prompts "lock-up" reminder
Police have reminded motorists to lock their cars after a 4WD was stolen from Lilypool Rd, South Grafton overnight on Wednesday.
The car, a white 1998 Holden Jackaroo, registration number BP96DW, has still not been recovered.
"The common denominator in many recent car thefts is that they are not secured," said Inspector Murray Gillett.