The arrow gun is the evolution of the dispenser. Given power, it will detect when a mob is in front of it, and will fire upon it. Faster input speeds equate to greater rates of fire, while higher torques cause the arrow to fly faster, farther and deal more damage.
Required Power: 1024W
Power Input: Back
Launch Velocity: 20*log_2(torque) m/s
Rate of Fire: 0.8-log_2(speed)/20 seconds per shot, up to 5 shots per second
Range: 10+2*log_2(torque) m