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.
300BLK_ASC_AR-15_Aluminum_300BLK_20rnd_Magazine.dat
GUID 486829cb497740978834703dfa6ad622
Type Magazine
Rarity Uncommon
ID 36852
Size_X 1
Size_Y 2
Size_Z 0.23
Amount 20
Count_Min 13
Count_Max 20
Equipable_Movement_Speed_Multiplier 1
Aim_Duration_Multiplier 0.7
Speed 1.2
Calibers 1
Caliber_0 35248
Tracer 48
Blueprints 9
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 36689
Blueprint_1_Build 30
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 36852
Blueprint_2_Build 30
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 36853
Blueprint_3_Build 30
Blueprint_4_Type Ammo
Blueprint_4_Supplies 1
Blueprint_4_Supply_0_ID 36854
Blueprint_4_Build 30
Blueprint_5_Type Ammo
Blueprint_5_Supplies 1
Blueprint_5_Supply_0_ID 36860
Blueprint_5_Build 30
Blueprint_6_Type Ammo
Blueprint_6_Supplies 1
Blueprint_6_Supply_0_ID 37603
Blueprint_6_Build 30
Blueprint_7_Type Ammo
Blueprint_7_Supplies 1
Blueprint_7_Supply_0_ID 37604
Blueprint_7_Build 30
Blueprint_8_Type Ammo
Blueprint_8_Supplies 1
Blueprint_8_Supply_0_ID 37605
Blueprint_8_Build 30
Use_Auto_Icon_Measurements False