It may or may not depending on the type of replica.
You can dry fire a "REPLICA" gun if the action will allow. Some "REPLICA" guns will not have a true action and therefore cannot be fired. NEVER try to load live ammunition in a "REPLICA" gun.
no
It's a copy of a gun/rifle that can't fire.
Non firing replica
yes
Try google
No, you do not.
First, you're talking about something typically illegal to do. Second, you're talking about something particularly dangerous to do, as the construction of dummy and replica firearms is not built to withstand the pressures generated by the firing of cartridges.
watever
An air gun is usually a replica of a real firearm that is powered by air or C02 that is used to fire a projectile (Pellet or BB). Only air or C02 is used in the air gun. Whereas a firearm uses gunpowder to fire a bullet. Air guns are powerful but not a powerful as a real firearm.
Laws on this vary by jurisdiction.
There are no permits required for paintball guns.