Well, that was the whole point of creating all that licensing bullshit in the first place during the 90's in most nations : reducing the number of gun owners and legal guns in circulation by making it long/annoying/expensive to own guns, thus deterring the majority of people.
It was the first step toward the complete ban on private ownership of firearms, planned for 2025.
It is vital to do that, in order to destroy a country's gun culture, making sure that the new generations won't know anything about guns except what they hear in the media and be completely adverse to them, and the fewer gun owners they are, the less relevant they are politically/the less they can put up a fight for their rights.
The second step is to create new gun laws every few years, increasing the requirements/amount of bullshit one has to go through, banning some types of guns, having a magazine capacity limit, making it easier for the authorities to confiscate everything without any due process or compensation... to deter current gun owners from continuing to own their guns.
The latest law is the EU gun law of 2017/2018, but it won't be the last. From now on, there will be a new law every 2 years, until 2025.
And the last step, since there will be very few gun owners left, will be a complete ban, they'll say "oh well, gun owners are a tiny minority anyway so there is no reason why their right to own a killing machine should trump other people's right to live in peace, might as well ban everything". Of course, hunting, which is demonized ever more by the greens/vegans and various left wing anti-hunters/guns types, is also on the verge of being slowly banned, and will be completely banned by the time guns will, that way there won't be a single justification for people to own guns anymore.
Shooting ranges might still exist, but it's going to be for airguns only, if that's even still allowed by then.
Mark my words, screecap this post.