A gun lobby group supports the auditing of firearms licencing recommended by an Independent Police Conduct Authority report into the fatal shooting of a gunman in a wheelchair last year.
Shayne Sime, 42, was shot and killed after he opened fire in a Christchurch street last year, wounding a neighbour and an officer.
The IPCA says Mr Sime's background and medical history cast doubt on whether he should have been granted a firearms licence.
It recommends independent, random auditing of licence applications.
The National Shooters Association supports that.
President Richard Lincoln says audits may note people with mental illness and other problems before they are given a firearms licence.
