fireport

plural fireports

1. A small opening in the armor or wall of a fortification, vehicle, or ship, designed for firing weapons while providing protection to the shooter.

   They were fitted with cabin armor add-ons, with fireports.

   2025 March 10, Wikipedia contributors, “CAESAR self-propelled howitzer”, in English Wikipedia, Wikimedia Foundation

   2 more examples

   Ten minutes later the destroyers and cruisers opened fire on the Wolmi-do, their gun crews by now intimately familiar with the island's fireport caves and bunkers.

   2001, Joseph H. Alexander, Fleet Operations in a Mobile War: September 1950-June 1951 (U.S. Navy and the Korean War), Naval Historical Center, page 20

   Machine guns were the usual weapon placed in the fireport, although direct-fire guns of up to 47-mm were also used.

   2015, James R. Holbrook, Michael E. Dunn, Tactical Responses To Concentrated Artillery, Pickle Partners Publishing, page ??