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.
12GSL.dat
GUID fa438dc36ec744b2979b8438f420a354
Type Magazine
Rarity Rare
ID 52357
Pellets 1
Ballistic_Damage_Multiplier 6
Spread 0.125
Recoil_X 1.05
Recoil_Y 1.05
Firerate -3
Size_X 1
Size_Y 1
Size_Z 0.1
Amount 6
Count_Min 2
Count_Max 6
Calibers 1
Caliber_0 51007
Tracer 51000
Blueprints 1
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 52357
Blueprint_0_Build 30
Delete_Empty