Minimum Effective Range is a weapon statistic in The Last Stand: Dead Zone.
The minimum effective range is a statistic that is applied to some weapons that determines the minimum amount of distance needed for the weapon to be reasonably accurate. It is depicted during a mission by a smaller circle consisting of red dashes within the white circle denoting Effective Range. The accuracy of the weapon is reduced by 50% when attempting to attack a target within the red circle. Unlike the white circle, survivors will still automatically attack targets within this red circle.
Minimum effective range does not apply to melee weapons.