[Error] Failed to call hook 'OnEntityDeath' on plugin 'NPCDropGun v1.6.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.NPCDropGun.GetRandomSkin (ItemDefinition idef) [0x00014] in <73ed0a8854804cd9936933df4e34353a>:0
  at Oxide.Plugins.NPCDropGun.ItemSpawner (BaseEntity heldEntity, UnityEngine.Vector3 dropPosition, UnityEngine.Quaternion dropRotation) [0x00051] in <73ed0a8854804cd9936933df4e34353a>:0
  at Oxide.Plugins.NPCDropGun.OnEntityDeath (BaseCombatEntity entity, HitInfo info) [0x00087] in <73ed0a8854804cd9936933df4e34353a>:0
  at Oxide.Plugins.NPCDropGun.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0026d] in <73ed0a8854804cd9936933df4e34353a>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0

Just a heads up. Great plugin

Thanks for the report

throws an error to the console