Police held a 23-year-old Malick man on Monday night after finding a gun and ammunition on a table at his home.
Police said between 10 and 11.30 pm on Monday, police from the North Eastern Division were on an Operation Strike Back exercise.
Acting on a tipoff, they went to Tenth Street, Sixth Avenue in Malick, with a warrant to search the suspect's home and searched the house in his presence .
Police said PC Shah found and seized a silver and black gun with a magazine and seven rounds of 9 mm ammunition on a table.
Police arrested and took the suspect to the Morvant police station.
Snr Supt Maharaj, Supt Ramjohn and ASP Pariman led the exercise, which Insp Bharath co-ordinated.
Acting Sgt Mitchell supervised the exercise with the assistance of PC Holder, members of the Morvant CID and the North Eastern Division Task Force.
Investigations are ongoing.