I call these bunkers butter bunkers & their no prize for guessing why, so what you will need to do this model is one butter tub, some plastic card & your bit's box.
We are going to cut the big flat piece out.
Next we need some plastic card, lay the card down & put the tub on top of it.
Now mark around the inside of the tub on the card this will be your floor.
Cut out the shape you marked on the card, the next is to cut out a piece of the black plastic that in the bottom of Dunne's stores shopping bags. You don't have to use the black stuff but it does add detail as it has a little diamond design in it.
Now cut some plastic card to go inside the bunker to make it sturdier these will have the cut out's for the firing slots in them.
I marked a centre point on the tub & the card to help getting them in place.
You will notice there's a lip running around on the out side of the tub which I;m going to cut off next.
Next cut out the slots in the tub in line with the one's in the plastic card that's glued inside.
Now we need to make away for the models to get in & out of the bunker, I decided to use to bike dases for doors, I then marked the out line of the two bases on the back wall, then mark a new set of lines about 5mm inside the other one's.
I gave the face of the bases a rub of sand paper to smooth them down & glued two little handle's to them
The handles are from a tank set.
Now we just need to do your roof using the lid off the tub.
The white piece on the roof is a hatch
don't glue on the roof