Media stunt. The blaster in question was modified. You cannot just put a gel ball into a nerf blaster and have it fire. There are two mechanisms preventing that which are required to prevent improvised projectiles being used. Brad essentially made a home made firearm and then took it to the police to register it. You can't. The gel ball will not engage the Air Restrictor and the dart post prevents a seal. The AR and dart post were removed and the barrel was downsized or wadding was used.