Maverick Pistol: Making Part 1

I have started a new Nerf mod this week, it's based off the Nerf Maverick which I have already created a gun from (Satanic Pistol). I have no name for this gun yet, just ideas where it's heading. See the photos so far below.
 

Fresh out the box...

  

...and the other side

  

Mock up with a view to cut out body above barrel

  

Cutting out and sanding the section

  

All cut out, sanded down...

  

...Ready to be broken down for paint