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.
PS_MGL_Nades_Rubber.dat
GUID f6f2b62889e34d6ba6ddc43ab1d4764a
Type Magazine
Rarity Epic
ID 59388
Size_X 2
Size_Y 2
Size_Z 0.255
Amount 6
Count_Min 3
Count_Max 6
Calibers 1
Caliber_0 59389
Tracer 59028
Blueprints 2
Blueprint_0_Type Tool
Blueprint_0_Searchable False
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 58999
Blueprint_0_Supply_0_Amount 1
Blueprint_0_Tool 58999
Blueprint_0_Tool_Critical
Blueprint_0_Build 27
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 59388
Blueprint_1_Build 30
Delete_Empty
Range 0
Player_Damage 1
Zombie_Damage 1
Animal_Damage 1
Barricade_Damage 1
Structure_Damage 1
Vehicle_Damage 1
Resource_Damage 1
Object_Damage 1
Explosion 59029
Explosive