Here's the Armament for the Navy's Constellation-Class Frigates
The Constellation-class frigates will be armed and combat-capable warships equipped with over-the-horizon Naval Strike Missiles, Rolling Airframe Missiles, and the Mk 110 57 millimeter gun.
Kevin Smith Frigate Program Surface Navy Association Symposium Littoral Combat Ship Frigate Program Manager Navy Association
Source: nationalinterest.org