How do you beat the pupa on Metal Gear Solid

To defeat the Pupa AI weapon in Metal Gear Solid: Peace Walker, you must first equip the RPG-2 rocket launcher, M60 or M16A1, a Support Supply Marker, and Rations and Spicy Curry. When the battle begins, climb onto one of the ledges. This will generally shield you from the Pupa's treads. Alternately using the RPG-2 and M60 or M16A1, shoot the Pupa. Where you shoot it will determine what kind of parts you will be able to salvage later for Metal Gear ZEKE. However, if this is your first time battling Pupa, don't concern yourself with where you are striking it. But the AI pod is the most vulnerable part of the weapon. Pupa will occasionally deploy "lightning" rods which attract its electrical shocks and can deal a great deal of damage if you're nearby. So if you get a chance, shoot these with your rifle to destroy them. If you find the Pupa driving towards you, lie down so it can't inflict damage on you. As you can only carry a maximum of seven RPG-2 warheads into battle, you will occasionally need to deploy a Support Supply Marker to get more. Additionally, keep either the Rations or Spicy Curry equipped in case the powerful Pupa deals damage to you with any of its various weapons. When its Life bar is depleted, shoot the AI pod, which will have its own miniature Life bar next to it at this point. You must do this in a timely manner otherwise the Pupa will regenerate Life and you will have to do battle again. Then walk up to the AI pod and press the Action button. This will allow you to enter the pod and extract memory boards, which you will use later to construct Metal Gear ZEKE.