Semi-automatic guns sold by the Defence Force to the public in the 1990s, are turning up in the hands of gangs and organised criminal groups.
More than 170 military-style, semi-automatic guns had been seized by police in the past five years.
More had been taken in each of the last three years than in any year in the past decade.
In a briefing to the Minister last year police said they were concerned that they had seized military-style guns from gangs and organised crime groups during searches.
They said gangs were starting to use a different type of firearm - the high-risk military-style guns used in massacres in the US.