US Navy Swift Boat (1/72 Scale) Boat Model Kit RMX850321Details: Unassembled plastic model kit in 1 72 scale of a U. S. Patrol Craft Fast, an all aluminum 50 feet long boat, developed for coast patrol and interior waterways patrol interdiction during Vietnam War. They used to carry a crew of six men and their common armament was a twin . 50 caliber M2 Browning in a turret over the pilot house and a . 50 caliber and 81mm mortar in the rear deck.