About Rocket Barrage
/Barrage <quantity>: Initiates a rocket barrage by shooting rockets in the direction the player is looking. The player needs the rocketbarrage.use permission to execute this command. <quantity> specifies the number of rockets to shoot in the barrage.
/rbt <level>: Sets the delay level for rocket shots during the barrage. The player needs the rocketbarrage.use permission to execute this command. <level> should be a number between 1 and 5, where 1 means a delay of 0.1 seconds between each rocket shot, and 5 means a delay of 0.5 seconds.
/rocket <type>: Sets the type of rocket to use during the barrage. The player needs the rocketbarrage.use permission to execute this command. <type> specifies the type of rocket, which can be one of the following: rocket (default rocket), incin (incendiary rocket), or hv (high-velocity rocket).
/rbc: Cancels an ongoing rocket barrage. The player needs the rocketbarrage.use permission to execute this command.