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.
556MARS_Colt_MARS_Std_30rnd_Magazine.dat
GUID 57c77d89d5e14834a790fc6f634d7f96
Type Magazine
Rarity Rare
ID 36828
Size_X 1
Size_Y 2
Size_Z 0.235
Amount 30
Count_Min 12
Count_Max 30
Equipable_Movement_Speed_Multiplier 1
Aim_Duration_Multiplier 1
Speed 1
Calibers 1
Caliber_0 35252
Tracer 48
Blueprints 3
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 119
Blueprint_0_Build 30
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 36691
Blueprint_1_Build 30
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 36828
Blueprint_2_Build 30
Use_Auto_Icon_Measurements False