Koalas have fingerprints. In 1907, people were able to buy the semi-automatic Winchester Model 1907. It could be purchased from a Sears catalogue and be delivered by the US Post Office. It was a high powered, centerfire rifle with a detachable, high-capacity magazine. About 400,000 semi-automatic rifles were produced before WWII. Civilians had hundreds of thousands for 40 years. The 1907 fired just as fast as an AR15 or AK47, and the bullet (.351 Winchester) was larger than those fired by the modern weapons. How to stop drunk drivers from killing sober drivers? Ban sober drivers from driving, same as banning responsible gun owners from owning guns. Koalas have no money - thank goodness.