How to Make Guitar gun 101:
1) Buy either an ak47 gold plated or an-94
2)keep playing games and doing jobs until you get 7plastic AND 7screws (Pallets) From doing jobs
3)go to forge select your ak47 gold plated OR an-94 click auto complete and you will see the guitar gun
4)Press Forge..boom you got it
*the gun only lasts as long as you have the ak47 gold plated/an-94