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.
AA12 Drum.dat
GUID f57f82ffc7ba47cd84e19de332f456bb
Type Magazine
Rarity Rare
ID 58958
Size_X 2
Size_Y 2
Size_Z 0.3
Amount 20
Count_Min 3
Count_Max 19
Calibers 1
Caliber_0 56139
Spread 1.6
Shake 1.25
Recoil_X 1.25
Recoil_Y 1.1
Speed 0.65
Equipable_Movement_Speed_Multiplier 0.9
Pellets 8
Tracer 48
Blueprints 8
// 8 shells
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 58178
Blueprint_0_Build 55048
// Saiga-12 mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 58180
Blueprint_1_Supply_0_Critical
Blueprint_1_Build 55048
// 2 shells
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 58185
Blueprint_2_Build 55048
// Saiga-12 8rnd mag
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 58834
Blueprint_3_Supply_0_Critical
Blueprint_3_Build 55048
// 5 shells
Blueprint_4_Type Ammo
Blueprint_4_Supplies 1
Blueprint_4_Supply_0_ID 58949
Blueprint_4_Build 55048
// AA12 Mag
Blueprint_5_Type Ammo
Blueprint_5_Supplies 1
Blueprint_5_Supply_0_ID 58955
Blueprint_5_Supply_0_Critical
Blueprint_5_Build 55048
// AA12 Drum
Blueprint_6_Type Ammo
Blueprint_6_Supplies 1
Blueprint_6_Supply_0_ID 58958
Blueprint_6_Build 55048
// MAG-7 Mag
Blueprint_7_Type Ammo
Blueprint_7_Supplies 1
Blueprint_7_Supply_0_ID 59713
Blueprint_7_Supply_0_Critical
Blueprint_7_Build 55048