This is my first instructable.

Step 1: Stuff You're Gonna Need

They are represented in the picture below.

Step 2: First of All, Draw the Grip.

Base the size on your hand.

Step 3: Then, Cut It Out.

Step 4: Attach

Glue them together with some more layers or some little pieces of cardboard.

Then, draw the receiver exactly above the grip. You might think about using it for size comparsion. Copy the receiver, then do the same as in the first line.

Step 5: Do This for the Barrel Cover Also. and the Magazine Well.

Then, after you did all of this to the gun, isolate its sides and the front. Put something in the mag well. You might think about adding a non-moving trigger or details.

Step 6: Disassemble the Sharpie

Take it apart. Keep the cap. With the pliers and hack saw cut a little piece out. Attach it in the front of the gun and the cap in the barrel cover for a bolt.

TRY to understand.

Step 7: Paper Mache It.

Dont do it for the mag well. Then make a magazine, which is only a box with the top open. Apply a good paint job. Have fun with it (i am challenging you for that)