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.
OSV-96 Mag API-HC.dat
GUID a7ca697d143b48b2641808f3ca319847
Type Magazine
Rarity Legendary
ID 58242
Size_X 1
Size_Y 1
Size_Z 0.3
Amount 5
Count_Min 3
Count_Max 5
Calibers 1
Caliber_0 56041
Spread 2
Shake 1.25
Recoil_X 1.8
Recoil_Y 1.6
Ballistic_Damage_Multiplier 2
Equipable_Movement_Speed_Multiplier 0.995
Tracer 48
Explosion 55073
Explosive
Blueprints 3
// Belt
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 58360
Blueprint_0_Build 55048
// Lynx mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 58233
Blueprint_1_Supply_0_Critical
Blueprint_1_Build 55048
// OSV mag
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 58242
Blueprint_2_Build 55048