Over 200,000 people are taking advantage of a "loophole" in New South Wales firearms legislation to acquire guns, according to a research group.In many parts of Australia, people are required to prove they have a "genuine reason" to own a gun.In NSW, the overwhelming majority of firearms licence holders state that reason as either hunting or sports shooting, the latter of which only requires the holder to be a paid member of a sports shooting club.READ MORE: Donald Trump says