This is because airguns where already covered under existing firearms law when the VCRB was written. UK firearms law is a disjointed mess and needs totally overhauling. However if they ever get round to it it will be bad news for some shooting sports. Every Airsofter, Paintballer, Air Gunner Shotgunner, Rifle Shooter and Pistol Shooter should get together and join organizations and fight every proposed law, not just the ones that affect them. Otherwise one day al we'll have left is Fortnight!