Mass killings happened in Norway, almost happened in France on that train, Australia AFTER the ban. It's bullshit. It's not guns here that causes this, but they all assume it's easy.
Guess what? The UK, Australia and Japan are surrounded by water! We have a huge connected landmass with country lines, you could never eliminate gun ownership or possession here. So how about we end the war on drugs, deal with mental health and solve the problems that cause the violence? Jailing endlessly doesn't work, prohibition doesn't work, solve the real problems. Banning shit is for people who want to fail at their agenda.