This seems like such an obvious question I'm sure it has been raised before now but a search of the forum didn't turn up an answer for 6th ed so my apologies if it has been covered.
Can a barrage weapon choose to fire indirectly when it has line of sight to its target?
The example that came up: a basilisk wished to fire at a unit of battle sisters, it had line of sight through a ruin that would have granted them a 4+ cover save. Could it have chosen to fire indirectly at them?
My reading of p.34, Barrage, 1st bullet point, is that a weapon with Barrage may ignore the restriction on requiring line of sight and may fire within its own minimum range but only using the indirect fire rules as laid out underneath. It does not state the the unit may chose which fire mode to use (regular or indirect)