“…According to the latest figures police released to the Herald , shotguns were the most common illegal firearm seized. During the 2014/2015 period, 272 full-length and 79 cutdown shotguns were confiscated, as well as 44 pistols, 23 military-style semi-automatics and 47 cutdown rifles…”
So NZ Herald has to use an OIA request to get the real info
“…Police believe the source of most illicit firearms in New Zealand continues to be residential burglaries, according to their 2011 National Strategic Assessment paper, earlier released to the Herald under the Official Information Act…”
SOLVE BURGLARIES – problem solved. Leave the most law abiding sector of society (licenced gun owners) alone.