Hello bois , 
this article is about rewards that hide behind 7k needed hits.
So lets go: 

For 750 hits you will got :5 energy bars and 50 rpg
For 1500 hits you will got:10 energy bars and 100 rpg
For 2500 hits you will got :10 q4 missiles and 1 q2 booster
For 3500 hits you will got :20 energy bars and 250 rpg
For 5000 hits you will got: 40 energy bars and 500 rpg
For 7000 hits you will got :15 golds and 1 q4 booster.

Thats it bois, in my opinion rewards are good to farm ,especially for rpg-s. 

See ya and stay safe.