You shouldn't have this.
The item id for Kuwait Outlands Rocket Cell in unturned is 5151. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Size_X: 1
Size_Y: 1
Size_Z: 0.25
Amount: 8
Count_Min: 8
Count_Max: 8
Calibers: 1
Caliber_0: 5151
Master_Bundle_Override: kuwait.masterbundle
Bundle_Override_Path: /Items/Magazines/Kuwait_Chuck_Bullet_1