The new Zealand Police have briefed Police Minister Judith Collins that they want a law change to require a licence for air guns with a muzzle energy in excess of 34 Joules 1 The Thorp report of 1997 (from retired judge Sir Thomas Thorp) recommended that high-powered air rifles be classified as firearms as do many other countries 2. Because the Thorp report contained many other stupid recommendation, this obvious recommendation has been ignored by two successive governments COLFO is quoted as supporting the proposed licence change, and that seems a good move What we have to watch out for now is what is piggybacked into the same law change, it will probably be what is required to make thumbhole stocks defined as E-Cat :-) [1] A typical air gun pellet leaving the barrel at 213 metres per second (700 ft/s) and weighing 0.20 grams (3.1 gr) has a muzzle energy of 4.43 Joules (3.27 ft.lbf), or at 100 metres per second (330 ft/s) it will be 1.0 Joules In comparison: The New Zealand Police have level 3 stab proof vests which are rated at 45 J And a common hunting rifle using 7.62 x 39 ammunition with a 123 gr (8.0 g) bullet with a muzzle velocity of 710 meters per second (2,300 ft/s) has 2,010 Joules (1,480 ft·lbf) [2] A quick summary of other countries that have air gun restrictions or muzzle joules limits
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