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.
50bmg_Barrett_M82_Extended_15rnd_Magazine.dat
GUID 4cf1f9c99aca40cbbf65e840bff969e1
Type Magazine
Rarity Mythical
ID 37870
Size_X 1
Size_Y 2
Size_Z 0.4
Amount 15
Count_Min 5
Count_Max 15
Equipable_Movement_Speed_Multiplier 0.9
Aim_Duration_Multiplier 1.35
Speed 0.7
Calibers 1
Caliber_0 35048
Tracer 48
Blueprints 10
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 1193
Blueprint_0_Build 30
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 35029
Blueprint_1_Build 30
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 36059
Blueprint_2_Build 30
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 35667
Blueprint_3_Build 30
Blueprint_4_Type Ammo
Blueprint_4_Supplies 1
Blueprint_4_Supply_0_ID 35907
Blueprint_4_Build 30
Blueprint_5_Type Ammo
Blueprint_5_Supplies 1
Blueprint_5_Supply_0_ID 36063
Blueprint_5_Build 30
Blueprint_6_Type Ammo
Blueprint_6_Supplies 1
Blueprint_6_Supply_0_ID 36327
Blueprint_6_Build 30
Blueprint_7_Type Ammo
Blueprint_7_Supplies 1
Blueprint_7_Supply_0_ID 37728
Blueprint_7_Build 30
Blueprint_8_Type Ammo
Blueprint_8_Supplies 1
Blueprint_8_Supply_0_ID 37870
Blueprint_8_Build 30
Blueprint_9_Type Ammo
Blueprint_9_Supplies 1
Blueprint_9_Supply_0_ID 37871
Blueprint_9_Build 30
Use_Auto_Icon_Measurements False