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.
SMGHL.dat
GUID 5403419fa1984d4f80e132c2f63920ee
Type Magazine
Rarity Rare
ID 52390
Size_X 1
Size_Y 2
Size_Z 0.1
Amount 50
Count_Min 50
Count_Max 50
Calibers 1
Caliber_0 51008
Tracer 51000
Ballistic_Damage_Multiplier 0.9
Spread 1.1
Recoil_X 1.1
Recoil_Y 1.1
Explosive
Explosion 51080
Spawn_Explosion_On_Dedicated_Server
Range 3
Player_Damage 2
Zombie_Damage 10
Animal_Damage 10
Barricade_Damage 0
Structure_Damage 0
Vehicle_Damage 5
Resource_Damage 5
Object_Damage 10
Delete_Empty
Blueprints 1
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 52390
Blueprint_0_Build 30