Apparently it’s being pushed by a couple that lost a child to an air rifle. As much as people might feel for them, we ought not, in a free society, remove other people’s freedoms for the sake of a single grieving couple. Grief seldom makes good public policy.
But this does go to show, eventually they will come after anything dangerous. They will turn the world into a huge padded cell, for your own protection. Future generations will never miss freedom they never had.