A firing point is a prepared fighting position from which infantry

Infantry

Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

 can defend territory with minimal exposure to return fire. Construction ranges from simple sandbag

Sandbag

A sandbag is a sack made of hessian/burlap, polypropylene or other materials that is filled with sand or soil and used for such purposes as flood control, military fortification, shielding glass windows in war zones and ballast....

 walls to sophisticated, permanent fortification

Fortification

Fortifications are military constructions and buildings designed for defence in warfare and military bases. Humans have constructed defensive works for many thousands of years, in a variety of increasingly complex designs...

s. Large artillery

Artillery

Originally applied to any group of infantry primarily armed with projectile weapons, artillery has over time become limited in meaning to refer only to those engines of war that operate by projection of munitions far beyond the range of effect of personal weapons...

 emplacements, for example, are vulnerable to attack by lightly armed and mobile troops who can avoid the primary armament's field of fire by dispersal or stealth, or by taking advantage of the limitations in the weapon's traverse or depression. Military engineers typically include firing points in these constructions, allowing defenders to deflect such an attack. This includes slit trenches, pillboxes, and redoubt

Redoubt

A redoubt is a fort or fort system usually consisting of an enclosed defensive emplacement outside a larger fort, usually relying on earthworks, though others are constructed of stone or brick. It is meant to protect soldiers outside the main defensive line and can be a permanent structure or a...

s.