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Picture of The GLX-17 Medusa Nerf Grenade Launcher/Shotgun
While messing around with Meanbean's nerf Grenade Launcher, I figured out that it would fit perfectly onto 1'' PVC pipe. the Medusa was born. 

Step 1: Supplies

Picture of Supplies
tools:
          PVC cutters or hacksaw
          ruler or tape measure
          PVC as shown in the picture

 

That's one beautiful Mav.

COOL SHOTGUN BUT WHERE IS THE TRIGGER >:C
You twist it -.-