Military grade Hydra rocket pods.
The item id for Hydra Rocket Pods in unturned is 8054. 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: 3
Size_Y: 2
Size_Z: 0.5
Amount: 6
Calibers: 1
Caliber_0: 567
Asset_Bundle_Version: 2