If you give someone 90 minutes they don't need a semi auto with a large magazine.
In the 26 years since Australia banned auto and semi auto weapons, instituted a registry, a 28 day waiting period and a buy back program after the Port Arthur massacre in 1996 , it has had one shooting involving 5 or more people, a murder suicide involving a single family.
In the 18 years before 1996 there were 13 mass shootings involving 5 or more