The Greens are pledging to repeal controversial laws that strip citizenship from dual national terror suspects and to clamp down on gun ownership.

The Greens voted against the citizenship legislation when it passed parliament last year with the support of Labor, arguing Australia could not be made safer by exporting terrorists to other countries.

In its justice policy released by Greens senator Nick McKim on Thursday, the party has pledged to repeal the laws and ensure Australian citizens suspected of extremism overseas are dealt with by the Australian justice system.

"Anything less is an abrogation of our responsibilities for maintaining international peace and security," the policy document says.

The Greens are also pledging to work with security agencies and experts to draw up a blue paper for dealing with radicalisation and extremism beyond a law and order approach.

The justice policy also proposes an update of the national firearms agreement to tighten gun controls and ban semiautomatic handguns.

The Greens want all magazine-loaded rapid-fire shotguns, including those with a lever action like the controversial Adler A110, classified as a category C or D firearm, making them difficult to import.