OnNPCkill problem.

[not490]

I placed the NPC to drop crowbar upon death but still they drop the original HL2 weapons + the crowbar i have set. What i am missing?

if not SERVER then return end

local WeaponList = {
    "weapon_crowbar"
}

hook.Add("OnNPCKilled", "DropWeaponOnNPCKilled", function(npc, killer, weapon)

    local weapon = ents.Create(table.Random(WeaponList)) --randomly choose a weapon entity from WeaponList
    weapon:SetPos(npc:LocalToWorld(npc:OBBCenter())) -- Set the position to the center of the NPC
    weapon:Spawn()

end)

[Axspeo]

Because by default if a player or npc is killed they will drop their weapons.
You could use Player/StripWeapon to remove the NPC weapons so only the crowbar would be dropped.