Is shotgun-loving senator Bridget McKenzie a double agent inside the newly formed Parliamentary Friends of Gun Control?

The National Party senate whip, who last year defied Prime Minister Malcolm Turnbull by crossing the floor to vote in favour of allowing the importation of the rapid-fire Adler shotgun, says she is not.

While even the groups' co-convenor, Labor's Andrew Leigh, described her membership of the Friends of Gun Control as "a tad surprising", Senator McKenzie told Fairfax Media she was attracted by the promise of "evidence and facts" in the debate over guns.

"If the group sticks to what it says it wants to achieve there won't be any disagreements about anything because the focus will be on evidence-based firearm regulation in Australia," she said.