1. Weapons, direct and indirect fire artillery, and guns with a calibre bigger than 12.7 mm, their ammunition and components.

2. The U.S. Army uses three types of mortar for indirect fire support when heavier artillery may not be appropriate or available.

3. The M1A2 Infinity Aiming Collimator is an optical instrument used for establishing an optical reference from which weapon deflection angles can be measured for indirect fire

4. The introduction of the Antlion was at least in part a reaction to the proliferation of Anti-Missile Systems, which rendered other indirect fire systems significantly less

5. However, in 1906, indirect fire goniometric sights were adopted; these consisted of an alidade mounted on a circular scale graduated in degrees that was mounted on the shield.

6. These grenades will provide individual Marines additional firepower and will allow indirect fire against targets in defilade, behind walls and buildings or rooftops and elevated positions at ranges between 30 and 150 meters.

7. The Antlion was an unusual Quad BattleMech; it was purpose-built by StarCorps Industries for the Armed Forces of the Federated Suns from their plant on Crofton to fill a tactical indirect fire support role