Regulation 6 Specifications for imitation firearms

an imitation revolver must incorporate an inclusion cast into the dummy barrel and a separate inclusion cast into the cylinder which extends to fully obstruct all the dummy chambers;

the inclusions must be wholly made of a material which is at least as resistant to being cut, drilled, bored, ground (or any similar process) as sintered tungsten carbide in the range 1550-2000 HV 30;

the inclusions should be permanent and incapable of being knocked out without destroying the chamber or barrel;

the barrel inclusion must wholly block the dummy barrel and part of it must be incorporated into the rear of the dummy barrel;

the barrel inclusion must be intended to prevent removal of the dummy barrel, unless the frame of the firearm is rendered useless as a result or its integrity so compromised that it cannot be used to form the basis of a firearm without significant repair or addition;

the inclusions must be intended to prevent the creation of a hole through the dummy barrel or chamber along their axis; and

the revolver must vent the gasses produced on discharge at not less than 80 degrees from the axis of the dummy barrel.