The front end tube assembly is a very inexpensive solution to help give yourself a little bit more accuracy on your hurricane shots. No it will not turn this fun little pistol into a hyper accurate killing machine but it does do two things.
Firstly you get a little bit of the orange sticking out the end which helps anybody looking at it understand it's a toy. In a non-related suggestion I do think that the orange battery cover extenders available for this are also a good purchase for the same reason. Safety First in all things!
The second reason to get this as previously mentioned is because it does give you a little bit of a straighter flight and accuracy.
Have fun and play safe!