12 Gauge Caliber8 Round Capacity28x12 Zombie Damage
The item id for Frost Shell Buckshot in unturned is 36524. 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.
Amount: 8
Count_Min: 4
Count_Max: 7
Calibers: 1
Caliber_0: 36003
Pellets: 12
Blueprints: 1
Blueprint_0_Type: Ammo
Blueprint_0_Supplies: 1
Blueprint_0_Supply_0_ID: 36524
Blueprint_0_Build: 30