When Oceanyka was under the sovereignty of the British Empire, colonist authorities and settlers had a very particular problem; Australia's ultraviolent megafauna. To solve this problem, Her Majesty's government hired some of Britain's best gunsmiths to make them thousands of .600 Nitro Express double rifles, unmatched in their capability to put down even the largest of beasts; they were Westley Richards, a premium gunmaker company which still operates to this day. Said rifles were intricately decorated, extremely reliable, very accurate and possessed unbelievable firepower. As these guns are valuable collector's items outside of the country's borders, few remain and those that do fetch enormous prices.
