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.
vz.61 Mag 10rnd.dat
GUID cfaaeaa6337f4e93972bc0b321a082b0
Type Magazine
Rarity Rare
ID 58985
Size_X 1
Size_Y 1
Size_Z 0.2
Amount 10
Count_Min 5
Count_Max 10
Calibers 1
Caliber_0 56146
Spread 1.1
Shake 0.85
Recoil_X 0.94
Recoil_Y 0.94
Equipable_Movement_Speed_Multiplier 0.995
Tracer 48
Explosive
Explosion 55115
Blueprints 4
// Ammunition crate
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 58987
Blueprint_0_Build 55048
// vz.61 mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 58985
Blueprint_1_Build 55048
// vz.61 mag 20rnd
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 58986
Blueprint_2_Supply_0_Critical
Blueprint_2_Build 55048
// Walther PPK mag
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 58989
Blueprint_3_Supply_0_Critical
Blueprint_3_Build 55048