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_AA_Missiles.dat
GUID ba6530a23e20479d93f124e422906440
Type Magazine
Rarity Legendary
ID 10589
Size_X 6
Size_Y 3
Size_Z 0.6
Amount 8
Count_Min 0
Count_Max 8
Calibers 1
Caliber_0 10738
Delete_Empty
Tracer 19043
Blueprints 2
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 10589
Blueprint_0_Build 30
Blueprint_1_Type Tool
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 10539
Blueprint_1_Supply_0_Amount 4
Blueprint_1_Outputs 1
Blueprint_1_Output_0_ID 10589
Blueprint_1_Output_0_Amount 1
Blueprint_1_Build 27