pretty damn sure if you read the forbidden items in nigh on all couriers they will say no to immitation firearm, blank ammunition & pyro's, no to compressed gas blah blah blah but retailers post them in proper boxes etc.. and they all arrive ok from many couriers
Deffo was RM delivering a Hong Kong HobbyKing order coz I was out and had to collect it from depot type of thing. Not sure about a UK HobbyKing order but think that has RM option