No. However, there are fireworks which have a sufficient yield to require classification as a Destructive Device by the BATFE.
No.
Fire lance AKA Worlds first firework and firearm
Fire lance AKA the worlds first firework and firearm
It would be classed as a destructive device, not a firearm.
No.
No, it is not.
If it uses gunpowder to launch a projectile it is considered a firearm
Yes, a 12 gauge shotgun is considered a firearm.
No.
No it is not a toy. In some countries it is considered a firearm. In the USA it falls into a grey area. Not quite a firearm but not a toy.
No
yes
A firearm is a firearms, regardless of whether or not is has the magazine with it. The receiver is the part which is considered the basis of the firearm, not the magazine.