Former All Black Andrew Hore has lost his bid for a discharge without conviction on a charge of supplying an unlicensed person with a firearm.

The 37-year-old appeared in the Alexandra District Court today.

The charge relates to an incident on the opening weekend of the duck shooting season.

Hore's lawyer argued he should be discharged because of the consequences a conviction could impact on his international travel, particularly around the Rugby World Cup.

Judge Dominic Flatley rejected that and fined Hore $400.

The lawyer for the 37-year-old criticised media coverage of the case.

David Robinson said there had been a lot of confusion about the incident, and the events of that day had taken on a life of its own.

He said it needed to be made clear that Hore lent the gun to another man around 8 am, and it was later in the day, around 3pm, when the man he'd lent the firearm too was involved in an incident resulting in gunshot wounds to his arm.

David Robinson says that incident, in the afternoon, had nothing to do with his client, and media linking of the too had caused the former All Black's family plenty of stress, "particularly to his wife's mother in the UK."

Mr Robinson told the court, while there had been some alcohol consumed during the day, that was normal for maimais up and down the country during opening weekend.

"You would struggle to find any maimai's where alcohol isn't present."

Judge Flattley's responded with "that's exactly the point."

Hore's lawyer then went over the serious consequences conviction would have on his client, saying it could preclude him from overseas travel and that he has a number of engagements scheduled for the Rugby World Cup.

Judge Flattley addressed the World Cup winning All Black, describing his approach to gun safety as "nothing short of cavalier." He pointed out the man Hore lent his gun too had had his firearms license revoked two years ago, but Hore still handed him the gun.

While Hore said he was remorseful, Judge Flattley said he struggled to see any demonstration of that remorse and such offending could have very serious consequences.

He told Hore he would still be able to travel overseas with a conviction, but would need to jump through a few more hoops.

With that he convicted Hore, fining him $400 and $130 court costs.