Repeating Arrow Trap

Start out making a five long row of dispensers.
Redstone

Place the Redstone along the dispensers put repeaters facing the dispensers make a circle of repeaters set them to tick 4
Firing

this is what you will see with the arowes mid fire
Done

With the arowes fired and disappeared or you colectied them you will need to reset the trap
Grouped

This is when you will go in and colect the arowes and the loot