field of fire

plural fields of fire

1. The area that a projectile weapon (or group of weapons) can reach from a given position.

   Get those turrets up! Watch your fields of fire!

   2007 September 25, Bungie, Halo 3, spoken by Reynolds (Nathan Fillion), Microsoft Game Studios, Xbox 360, level/area: Crow's Nest

   1 more example

   The angle of movement is so slight that the gun could not be used unless an enemy plane just happened to fly within its limited field of fire.

   1942 May 4, Charles A. Lindbergh, The Wartime Journals of Charles A. Lindbergh, New York: Harcourt Brace Jovanovich, published 1970, page 634