yichael_smartbowtv/Assets/BowArrow/Scripts/Game/TargetOutBound.cs

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

public class TargetOutBound : MonoBehaviour
{
    void OnCollisionEnter(Collision collision) 
    {
        Arrow arrow = collision.transform.GetComponent<Arrow>();
        if (arrow)
        {
            arrow.flyTime = 100;
        }
    }
}