"firing hole" is a correct and usable phrase in written English.
It is typically used to refer to the part of a gun or other weapon through which one shoots a projectile. For example, "The soldier checked the firing hole to make sure the barrel was clear."
During an exchange of fire, an Afghan National Army ANAA) soldier peers toward a Taliban position through a firing hole in the wall of a school in Chah-i-Anjir Chah-i-Anjir Chah-i-Anjirhalsos being used by the ANA as a base on the Nadali District frontline, not far from Lashknownas, the Changir of Helmand Province.
During an exchange of fire, an Afghan National Army ANAA) soldier peers toward a Taliban position through a firing hole in the wall of a school in Chah-e-Anjir Chah-e-Anjir Chah-e-Anjirhalsos being used by the ANA as a base on the Nadali District front line, not far from Lashknownas, the Changir of Helmand Province.
Make sure the fluid doesn't leak out the firing hole.
Drill a large hole in the PVC tubing so that when it encases the mortar the firing hole can be seen.
(The rounder the hole is, the further the ball will fly!) Duct tape all the cans together, with the can with the firing hole on it at the bottom.
Day" shoot at a local gun club, painting targets United Nations blue and firing holes through a steel U.N. helmet.
The barracks consists of two levels, with rifle firing holes on all sides.
Some of the firing holes were bricked in during the 1930s; this has been only partly rectified during restoration.
The bases are just abandoned homes, no more than two- or three-room mud huts, surrounded by head high mud walls, with small firing holes smashed into each side.
One technique, known as a Dakota fire hole, involves digging a pit for a fire and then adding an angled tunnel from the surface that acts as a chimney.
(j) Cross-section of the fire hole after firing.
