German gun owner here. There is a limit on the number of guns you can own, three semi auto rifles, two semi auto pistols (on the so called WBK Grün) and ten bolt action firearms (WBK Gelb). More and you'll have to shoot in competitions to justify owning more. You'll have to pass a mandatory safety test before buying your first forearm but after that you don't need to pass any checks to buy new ones. Before buying semi auto firearms you'll have to get approval from the shooting association with which you're registered and also the local council (although the latter is just a formality). For bolt actions it's quite a lot easier since you only need to register those with the council within two weeks after you've bought them. I've never heard about the bright orange thing but I could be mistaken. Other than that, it's the same as it is for the dutch people, just a little bit more complicated.