Tank rocket launcher chambered in Missiles.
The item id for Tank Cannon in unturned is 1300. 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.
Useable: Gun
Slot: Primary
Sight: 1301
Magazine: 1302
Ammo_Min: 1
Ammo_Max: 1
Caliber: 29
Firerate: 50
Action: Rocket
Player_Damage: 200
Zombie_Damage: 200
Animal_Damage: 200
Barricade_Damage: 1000
Structure_Damage: 1000
Vehicle_Damage: 1000
Resource_Damage: 2000
Object_Damage: 1000
Range: 14
Explosion: 45
Aim_In_Duration: 0.3
Spread_Aim: 0.2
Spread_Hip: 0.05
Ballistic_Force: 3000
Recoil_Min_X: -3
Recoil_Min_Y: 3
Recoil_Max_X: 3
Recoil_Max_Y: 5
Recover_X: 0.7
Recover_Y: 0.7
Muzzle: 42
Reload_Time: 2