A 50-year-old man has been arrested on suspicion of possession of a firearm or ammunition in the Princes Street area of Lurgan on Monday.
He was released on police bail on Tuesday pending further police enquiries.
A PSNI spokesperson said: "Specially trained firearms officers attended the incident and a Conducted Energy Device (CED) was deployed to prevent harm to the person and officers.
"As is normal procedure, the Police Ombudsman’s Office has been informed of the incident."