Barrages can be constituted-of-or-filled-with (rocket fire).
A barrage can be constituted-of-or-filled-with rocket-propelled grenades.
A barrage can be constituted-of-or-filled-with (metal bullets).
Barrages can be constituted-of-or-filled-with (howitzer shells).
A barrage can be constituted-of-or-filled-with (air strikes).