One of the armed offenders squad's founding members, former Detective Inspector Graham Perry, had his share of dramatic encounters.
Putting down several prison riots and taking down gunmen on the loose all formed part of his 21-year AOS career. But it was an incident in 1969 that was probably his hairiest moment.
In July that year, Mr Perry fired the first-ever shot by an AOS member, during a seven-hour siege at a house in Whangarei.
Armed with an "obsolete" WWII rifle and ex-air force pistol, and sporting all the protection overalls and a beret could offer, Mr Perry took down a gunman who was holding a baby hostage in a house and threatening to shoot the baby and himself.
"We were called up there to a situation," he recalled this week.