Bullet Kills player

I’m building a fps game, but have an issue:

When the Player shoots a bullet, he is killed by his own, 99% guess that it’s hitting the gun, which the player is the parent of,

the script (In Quake Style, if hit by 1 bullet, DEAD)

using UnityEngine;
using System.Collections;

public class DeathScript : MonoBehaviour {
	
	
	void OnTriggerEnter(Collider obj)
	{
		if(obj.gameObject.tag == "Bullet")
		{
			Destroy(gameObject);
		}
	}

	
}

Give player bullets a different tag than enemy bullets.