IMHO o problema aqui é que a lei do Reino Unido proíbe a importação de armas de imitação . Citação de o Guia de Leis sobre Licenças de Armas de Fogo encontrado em Gov.uk :
Section 36 of the Violent Crime Reduction Act 2006 makes it an offence for a person to manufacture, sell, import or cause a realistic imitation firearm to be brought into Great Britain.
Acontece que uma arma de imitação é :
any thing which has the appearance of being a firearm (other than such a weapon as is mentioned in section 5(1) (b) of this Act), whether or not it is capable of discharging any shot, bullet or other missile
Juntas, essas duas declarações me fazem pensar que você não pode importar um controlador de console em forma de arma para o Reino Unido .
Para fins de integralidade, observe que seu amigo provavelmente será processado de acordo com a Seção 170 (2) da CEMA 1979 :
Section 170(2) of CEMA 1979 covers the import "smuggling" offence in so far as a person knowingly concerned in the fraudulent evasion or attempted evasion relating to goods (namely firearms) that are subject to any "prohibition or restriction." The prohibition upon the importation of firearms is contained in Article 1 of the Import of Goods (Control) Order 1954 (SI 1954/23) which was made under section 1 of the Import, Export and Customs Powers (Defence) Act 1939.