Absolutely, but acquiring a weapon legally is a process involving the police and requires a sensible intent (like hunting, sports or defense against polar bears) and an approved safe storage. While there are a lot of weapons in Norway, it's very heavily regulated.

With that said, the terror in Norway was performed with a firearm which was obtained legally with approval from the police, so the system is far from perfect.

From the wiki:

2019 – Cyclone Idai makes landfall near Beira, Mozambique, causing devastating floods and over 1,000 deaths.
2021 – Burmese security forces kill at least 65 civilians in the Hlaingthaya massacre.

It's recent enough that it still haunts the people of the country. It's also not an every day occurrence like in America.