A single barrel spitball shotgun I know I just built the double barrel shotgun but I just felt like building it and it works well so I put it on any way.
Step 1: Meterals
Step 2: The Barrel
take one straw take about an eighth of one straw and tape it on to 1 full straw make sure the top straw is sticking out a bit on one end and most on the other. as shown below.
Step 3: The Stock
cut the last straw in half take one half and fold it into a triangle like shown tape and tape it on the bottom straw and enjoy.