This item is not included in any spawn asset, but it doesn't necessarily mean that it doesn't spawn naturally on any of the maps.
Frost_Shell_Makeshift.dat
GUID b3f0f876b292487d89312b5a114b36fa
Type Magazine
Rarity Rare
ID 36526
Amount 4
Count_Min 4
Count_Max 4
Calibers 1
Caliber_0 36003
Pellets 8
Blueprints 2
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 36526
Blueprint_0_Build 30
Blueprint_1_Type Tool
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 36011
Blueprint_1_Supply_0_Amount 2
Blueprint_1_Build 27
Delete_Empty