Conversion of weaponsN.I.
67.—(1) Subject to paragraph (2), a person who shortens the barrel of a shotgun to a length less than 60.96 centimetres shall be guilty of an offence.
(2) It shall not be an offence under paragraph (1) for the holder of a firearms dealer's certificate to shorten the barrel of a shotgun for the sole purpose of replacing a defective part of the barrel so as to produce a barrel of not less than 60.96 centimetres in length.
(3) A person, other than the holder of a firearms dealer's certificate, who converts into a firearm anything which, though having the appearance of being a firearm, is so constructed as to be incapable of discharging any missile through its barrel, shall be guilty of an offence.
(4) A person who commits an offence under Article 3 by having in his possession, or purchasing or acquiring—
(a)a shotgun which has been shortened contrary to paragraph (1); or
(b)a firearm which has been converted as mentioned in paragraph (3) (whether by the holder of a firearms dealer's certificate or not),
without holding a firearm certificate authorising him to have it in his possession, or to purchase or acquire it, shall be treated for the purposes of the provisions of this Order relating to the punishment of offences as committing that offence in an aggravated form.