Re: @gazthejourno
ONLY for airsoft. Anything with higher energies needs one (included modded airsoft)
No. Air rifles at 12 ft Ib are far more powerful than airsoft and are perfectly legal without a license.
You can buy vermin hunter ammunition for them (which when used on rats passes straight through them).
You are far more likely to have legal problems with airsoft because many are classed as realistic imitation firearms.