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.
12 Gauge AP20 5rnd.dat
GUID e29d98379278419cb58b4056061f4cd5
Type Magazine
Rarity Rare
ID 59738
Size_X 1
Size_Y 1
Size_Z 0.25
Amount 5
Count_Min 2
Count_Max 4
Calibers 1
Caliber_0 56138
Spread 0.15
Shake 1
Recoil_X 1.1
Recoil_Y 1.2
Ballistic_Damage_Multiplier 5.5
Equipable_Movement_Speed_Multiplier 0.995
Pellets 1
Delete_Empty
Tracer 48
Explosion 55074
Explosive
Shell 55050
Blueprints 8
// 8 shells
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 59736
Blueprint_0_Build 55048
// Saiga-12 mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 59740
Blueprint_1_Supply_0_Critical
Blueprint_1_Build 55048
// 2 shells
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 59737
Blueprint_2_Build 55048
// Saiga-12 8rnd mag
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 59739
Blueprint_3_Supply_0_Critical
Blueprint_3_Build 55048
// 5 shells
Blueprint_4_Type Ammo
Blueprint_4_Supplies 1
Blueprint_4_Supply_0_ID 59738
Blueprint_4_Build 55048
// AA12 Mag
Blueprint_5_Type Ammo
Blueprint_5_Supplies 1
Blueprint_5_Supply_0_ID 59741
Blueprint_5_Supply_0_Critical
Blueprint_5_Build 55048
// AA12 Drum
Blueprint_6_Type Ammo
Blueprint_6_Supplies 1
Blueprint_6_Supply_0_ID 59742
Blueprint_6_Supply_0_Critical
Blueprint_6_Build 55048
// MAG-7 Mag
Blueprint_7_Type Ammo
Blueprint_7_Supplies 1
Blueprint_7_Supply_0_ID 59743
Blueprint_7_Supply_0_Critical
Blueprint_7_Build 55048
// Convert from individual shells
Blueprint_8_Type Tool
Blueprint_8_Supplies 1
Blueprint_8_Supply_0_ID 58967
Blueprint_8_Supply_0_Amount 5
Blueprint_8_Build 27