fireport

noun

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.

   “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.”

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

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