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.
CA_Empire_27.dat
GUID 38135966843240bb87c2aba0c963464c
Type Magazine
Rarity Rare
ID 42008
Size_X 1
Size_Y 2
Size_Z 0.225
Amount 27
Count_Min 14
Count_Max 27
Calibers 1
Caliber_0 41
Tracer 48
Blueprints 2
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 44
Blueprint_0_Build 30
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 42008
Blueprint_1_Build 30
Paintable
Master_Bundle_Override core.masterbundle
Bundle_Override_Path /Items/Magazines/Empire_28