station_obscurum_unity/Assets/Scripts/Item/Pistol/BulletComponent.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BulletComponent : MonoBehaviour
{
    [SerializeField]
    private float duration = 5f;
    private float existed = 0f;
    [SerializeField]
    private string type = "flare";

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }
    private void FixedUpdate()
    {
        if(existed >= duration)
        {
            Destroy(this.gameObject);
        }
        existed += Time.fixedDeltaTime;
        
    }
}