Officers seized a gun, ammunition and drugs during an Intelligence-led operation in Maloney on Tuesday.
One man was subsequently arrested.
According to a police report, between 8 pm on Tuesday and midnight, officers acting on intelligence went to an apartment at Building 21, Maloney Gardens.
During a search, the officers found a Glock 17 pistol, 13 rounds of ammunition and one kilogramme of marijuana.
Police said the suspect is to be charged for possession of arms, ammunition and possession of marijuana for the purpose of trafficking.
The pistol, police said, will also be sent for ballistic testing to see whether or not it was used in any murders or shooting incidents.