Warning: some higher power guns (mostly CO2) WILL pierce this. spring power guns, for the most part will not even put a dent in it unless at point blank range. No other intro is needed. This is what you're going to make.

Step 1: Materials Needed

The materials needed for this are:
pliers (if the cardboard you're using has staples in it)
duct tape
glue (any kind works)
spray paint ( different shades of green and possibbely black.)
a 2'1'' X 2' 11'' piece of card board (this will be layer 1)
Two 1' x 2'4'' pieces of cardboard these will be the thickest pieces of cardboard you should use.(mine were about .7'' thick) I am going to call these layer two.
A 1' 9.75'' X 2' 8'' piece of cardboard.(layer 3)

the exact measurements don't really matter as long as 3 is smaller than 1 by a few inches and 2 is smaller than those (When I say 2 I mean both pieces together.)

Before you start use your pliers to take out any staples in the cardboard

Step 2: Layer 1

take the layer 1 piece of cardboard and bend it at an angle of your choosing. it shouldn't be a verry small angle.
Put some glue on the bend where the wrinkles in the cardboard are.
Prop up the sides with something to keep the angle. If you need to, then weigh down the center of the cardboard.
Let the glue dry.

Step 3: Layer 2

the glue alone will not keep the angle. now glue down the layer 2 pieces so that they touch each other at the center.(layer 1 should still be bent) let the glue dry.

Step 4: Layer 3

once layer 2 dries on put some glue on top of them and place layer 3. layer3 should also be bent. Let the glue dry.

Step 5: The Best Material Ever!

Now get out our duct tape. we are going to make a handle for the shield. take a piece about 6'' long and another piece about 7'' long. put the pieces together stickey side inward so that the 6'' piece is centered with the 7'' one. Place this on the back of the shield. This is the first handle. make another below it so that you can put your arm through the bottom one and grab the top one.then staple them down and put more tape on the sides like so to make sure the tape doesn't com up. You may need more tape then I used.

Step 6: Camo Time (1)

spray paint the entire shield the lighter of your 2 or 3 colors. It doesn't need to be totally solid.

Step 7: Camo Time (2)

Get some leaves and place them on the shield after the fist layer of spray paint drys on.

Step 8: Camo Time (3)

spray the 2nd darkest color on. the leaves will stop it from painting parts of the cardboard. If you want you can let it dry with the leaves on and they'll stick for a while. I think it looks kind of cool that way, but in the end the leaves will fall off.

Step 9: The Final Camo

This step is optional.
now take your darkest color (mine was black) and spray it very lightly on the shield or any part of the shield. I just did the bottom half. This is what mine looked like. now you're done.