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.
RPGS.dat
GUID 3210d8527e884c178cac11b1ce600ffb
Type Magazine
Rarity Legendary
ID 52462
Size_X 4
Size_Y 1
Size_Z 0
Calibers 1
Caliber_0 52313
Use_Auto_Stat_Descriptions false
Amount 1
Explosion 51108
Explosive
Projectile_Damage_Multiplier .1
Projectile_Launch_Force_Multiplier .5
Projectile_Blast_Radius_Multiplier 1.6
Range 16
Player_Damage 5
Zombie_Damage 10
Animal_Damage 10
Barricade_Damage 0
Structure_Damage 0
Vehicle_Damage 0
Resource_Damage 0
Object_Damage 0
Explosion_Launch_Speed 30
Delete_Empty
Tracer 51000
Blueprints 1
Blueprint_0_Type Tool
Blueprint_0_Supplies 3
Blueprint_0_Supply_0_ID 51033
Blueprint_0_Supply_0_Amount 2
Blueprint_0_Supply_1_ID 51307
Blueprint_0_Supply_1_Amount 1
Blueprint_0_Supply_2_ID 51018
Blueprint_0_Supply_2_Amount 1
// Blueprint_0_Tool 51059
// Blueprint_0_Tool_Critical
Blueprint_0_Product 52462
Blueprint_0_Products 2
Blueprint_0_Build 27