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_XM1_AP_Missile.dat
GUID 1eeefe656db049ca91bf926f76c87197
Type Magazine
Rarity Legendary
ID 10520
Size_X 5
Size_Y 2
Size_Z 0.425
Amount 1
Calibers 1
Caliber_0 10707
Player_Damage 25
Zombie_Damage 25
Animal_Damage 25
Barricade_Damage 25
Structure_Damage 25
Vehicle_Damage 25
Resource_Damage 25
Object_Damage 25
Explosion 19044
Explosive
Range 8
Delete_Empty
Impact 19059
Tracer 12006
Use_Auto_Icon_Measurements False
Blueprints 3
Blueprint_0_Type Gear
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 10521
Blueprint_0_Supply_0_Amount 1
Blueprint_0_Outputs 1
Blueprint_0_Output_0_ID 10520
Blueprint_0_Output_0_Amount 1
Blueprint_0_Build 27
Blueprint_1_Type Tool
Blueprint_1_Supplies 5
Blueprint_1_Supply_0_ID 10526
Blueprint_1_Supply_0_Amount 1
Blueprint_1_Supply_1_ID 10522
Blueprint_1_Supply_1_Amount 1
Blueprint_1_Supply_2_ID 19378
Blueprint_1_Supply_2_Amount 1
Blueprint_1_Supply_3_ID 19680
Blueprint_1_Supply_3_Amount 3
Blueprint_1_Supply_4_ID 19036
Blueprint_1_Supply_4_Amount 1
Blueprint_1_Outputs 1
Blueprint_1_Output_0_ID 10520
Blueprint_1_Output_0_Amount 1
Blueprint_1_Tool 19375
Blueprint_1_Build 27
Blueprint_2_Type Tool
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 10520
Blueprint_2_Supply_0_Amount 1
Blueprint_2_Outputs 3
Blueprint_2_Output_0_ID 10526
Blueprint_2_Output_0_Amount 1
Blueprint_2_Output_1_ID 10522
Blueprint_2_Output_1_Amount 1
Blueprint_2_Output_2_ID 19680
Blueprint_2_Output_2_Amount 2
Blueprint_2_Tool 19375
Blueprint_2_Build 27