The front line belong to the men who worked there—rifle-men and machine gunners, mortarman, forward artillery observers, communications men, and medics.
The ACR "rifles" used smoothbore barrels to fire single or multiple flechette per round, rather than bullets, to provide long range, flat trajectory, and armor piercing abilities.
The group said in a statement that its fighters carried machine guns, grenades and assault rifles during the hour-long gunbattle, but that none of the militants were hurt.