You shouldn't be reading this :/
The item id for Hydra Turret in unturned is 8053. 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
Size_X: 1
Size_Y: 1
Magazine: 8054
Ammo_Min: 3
Ammo_Max: 6
Bursts: 2
Caliber: 567
Firerate: 20
Replace: 0.5
Action: Trigger
Player_Damage: 200
Zombie_Damage: 200
Animal_Damage: 200
Barricade_Damage: 750
Structure_Damage: 750
Vehicle_Damage: 750
Resource_Damage: 800
Object_Damage: 750
Range: 12
Explosion: 45
Spread_Aim: 0.08
Spread_Hip: 0.08
Ballistic_Force: 8000
Recoil_Min_X: 0
Recoil_Min_Y: 0.008
Recoil_Max_X: 0
Recoil_Max_Y: 0.01
Recover_X: 0
Recover_Y: 0
Asset_Bundle_Version: 2