null reference exception on get component

The code is giving me a null reference error and i dont understand why? The error is apparently on the 2nd line of ProjectileEquip function. been trying to figure it out for far to long.

 using UnityEngine;
 using System.Collections;
 
 public class SubMenuGUI : MonoBehaviour {
     
     public GUIStyle myGUI;
     public int selGridInt = 0;
     public string[] weapons = new string[] {"Plasma", "RailGun"};
     
     private scriptPlayer scriptplayer;
     
     void Awake(){
         scriptplayer = GetComponent<scriptPlayer>();
         
         
     }
     
     void OnGUI(){
         
         GUI.Box(new Rect(0,0,Screen.width,Screen.height),"Customize Your Ship", myGUI);
         selGridInt = GUI.SelectionGrid(new Rect(25, 25, 150, 30), selGridInt, weapons, 2);
         
         
         ProjectileEquip();
         
         
         if(GUI.Button(new Rect(Screen.width / 2 - 50, Screen.width / 2 + 150,100, 50), "Enter World"))
             Destroy(this);
     }
     
     void ProjectileEquip(){
         if(selGridInt == 0){
             scriptplayer.plasma = true;
         }
         if(selGridInt == 1)
             print("RailGun");
     }
     
 }