Section 1(6) Firearms Act 1982 states:
For the purposes of this section an imitation firearm shall be regarded as readily convertible into a firearm to which section 1 of the 1968 Act applies if—
(a) it can be so converted without any special skill on the part of the person converting it in the construction or adaptation of firearms of any description; and
(b) the work involved in converting it does not require equipment or tools other than such as are in common use by persons carrying out works of construction and maintenance in their own homes.