23+ Dispenser Crafting Rezept. 7 cobblestone + 1 redstone + 1 bow => 1 dispenser. Dispensers are capable of automatically shooting projectiles at mobs.
Sadly int the 1.12 version we need to modify minecraft itself to be able to use theses.
The crafting process creates 1 dispenser for each set of ingredients used. The ultimate crafting guide for minecraft! Information about the dispenser block from minecraft, including its item id, spawn commands, crafting recipe, block states it should come as no surprise to you that the dispenser block dispenses items. I know there is the automation interface but that.