This rocket kit has a shape reminiscent of a Soviet-era fighter jet. The inspiration actually came from the 1982 movie starring Clint Eastwood called "FIREFOX." The model is meant to look like a mean and stealthy fighter jet.
The unique trait of this rocket is the offset body tube. Even though the nose is not on the same centerline as the engine tube, the rocket is robust enough that it flies straight and true on D, E and F size rocket engines.
The big reason this is a skill level 4 rocket is that the air scoop is created by cutting the ends of the body tube at an angle. This is tricky and requires a steady hand to hold the hobby knife. But the instructions give you some guidance on how to do it with the minimum amount of fuss.
The fins are also a bit unusual, as you'll have to build up the shapes out of several smaller pieces. It isn't too hard, and the instructions are well done to provide you the necessary guidance in completing the harder steps.