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.
MRAD Mag MK22.dat
GUID b88d60379fd249f6aa0f5d77273ba10b
Type Magazine
Rarity Rare
ID 59590
Size_X 1
Size_Y 1
Size_Z 0.3
Amount 10
Count_Min 10
Count_Max 10
Calibers 1
Caliber_0 56213
Spread 0.9
Shake 1.6
Recoil_X 1.35
Recoil_Y 1.25
Equipable_Movement_Speed_Multiplier 0.995
Aim_Duration_Multiplier 1
Tracer 48
Explosive
Explosion 55118
Blueprints 2
// Ammo box
Blueprint_0_Type Ammo
Blueprint_0_Supplies 1
Blueprint_0_Supply_0_ID 59591
Blueprint_0_Build 55048
// MRAD mag
Blueprint_1_Type Ammo
Blueprint_1_Supplies 1
Blueprint_1_Supply_0_ID 59590
Blueprint_1_Build 55048