Yes i find it very odd, especially the gas powered pellet guns that look like Magnums and Berrettas and are black, yet airsoft which are limited in power by a great deal are illegal in black.
I used to work with a bloke who was from America and what is even worse the pellet guns are more expensive than the proper guns.
And crossbows wow, there are a serious piece of kit. You seen how far and accurate a 280lb draw crossbow is???
If i was building a warship and wanted to shoot a projectile i would try and get the working from a Heng Long tank, the gun i mean. Range is not to bad and it will only bruise at a distance. But saying that we used to use them at work and i displaced someone cornea. So not really recommended where people are.