Can the tip of this gun be removed somehow to allow a fake suppressor be added to the end of it?
the orange tip is either held on by a set screw or glued on if it is glued on you can use channel locks to take it off or heat it up then take it off. if its a set screw just unscrew it then take the tip off. I don't know if the barrel is threaded or not if it is you can add a mock suppressor.
how long is the barrel?
It has a 455mm inner barrel.