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.
MP7 Mag 40rnd.dat
GUID dc40fc0e7c25437698cd6152c5120f1e
Type Magazine
Rarity Rare
ID 58162
Size_X 1
Size_Y 3
Size_Z 0.3
Amount 40
Count_Min 5
Count_Max 40
Calibers 1
Caliber_0 56027
Spread 1.18
Shake 1
Recoil_X 1
Recoil_Y 0.7
Equipable_Movement_Speed_Multiplier 0.995
Tracer 48
Explosive
Explosion 55115
Blueprints 4
// Ammo Box
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 58164
Blueprint_0_Build 55048
// MP7 20 rnd Mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 58160
Blueprint_1_Supply_0_Critical
Blueprint_1_Build 55048
// MP7 30 rnd Mag
Blueprint_2_Type Ammo
Blueprint_2_Supplies 1
Blueprint_2_Supply_0_ID 58161
Blueprint_2_Supply_0_Critical
Blueprint_2_Build 55048
// MP7 40 rnd Mag
Blueprint_3_Type Ammo
Blueprint_3_Supplies 1
Blueprint_3_Supply_0_ID 58162
Blueprint_3_Build 55048