Whether you call them a bb gun ,bebe gun beebee gun, or a bibi gun they are all the same thing airsoft guns. most people in the uk call the two tone coloured weapons bb guns and the black guns airsoft guns but they are essentially the same thing just one is classed as a realistic firearm, and the other are classed as an unrealistic firearm. They will both work the same and have the same power etc as they are the same bb guns just in different colours. With the two tone versions you will not need any type of membership or licence to buy them but black ones you will need something. But that's a whole other story, but to be clear all of the bbs guns for sale on this site, are entirely legal, and you will not need a licence to buy one. There are lots of different kinds of bb guns . Generally, the most cheapest bb guns are spring powered and gas or electric bbguns are usually cost a bit more, this goes for both pistols and rifles. for beginners, you could start with a metal pistol or an electric rifle. as with everything you get what you pay for and the more you spend the better gun you will get.