PIDGEON BANE is a long range, high velocity pea gun that can be used to scare off birds from the comfort of your balcony/window. If you have had problems with pigeon poop on your car or terrace, this might solve your problem!
The birds don't get injured by this gun unless it's a close range head shot. It scares them off good though so they are likely never to come back. Be careful never to aim this pea gun at a human though!
The ring walls inside the barrel are there to reduce the noise while firing... slightly :)