The families of nine victims of the 2012 Sandy Hook Elementary School shooting in the US have agreed to a US$73 million ($110m) settlement of a lawsuit against the maker of the rifle used to kill 20 young children and six educators in 2012.

Remington, which made the Bushmaster AR-15-style rifle used in the massacre, also agreed to allow the families to release numerous documents they obtained during the lawsuit including ones showing how it marketed the weapon, the families said Tuesday.

The families and a survivor of the shooting sued Remington in 2015, saying the company should have never sold such a dangerous weapon to the public. They said their focus was on preventing future mass shootings.

“Today is not about honouring our son Benjamin. Today is about how and why Ben died,” said Francine Wheeler, whose 6-year-old son was killed in the shooting.