In the uk lots of people call airsoft guns bb guns.
In the usa a bb gun is a gun that fires a metal pellet (in the uk known as a air rifle) we do not sell this type of gun.
but in the uk if you’re hear someone say bb gun they are probably are referring to what is know worldwide as airsoft gun. (like we sell)
the only guns we sell on this site are all legal two tone colored airsoft guns that you do not need a licence to buy.