Disclaimer: I will not be held responsible for your actions and any injuries that result from the making or usage of this device.
Step 2: Start making
Step 3: Making the bullet control point
The dowel is cut to about 3cm/1 inch long.
Step 4: Putting it all together
Slide the Control Unit into the PB barrel until the two feed-holes Line up and epoxy into place (the epoxy is to prevent the "Unit" from becoming a bullet while shooting.
Stuff the space between the Barrels with tissue or newspaper (or preferably Epoxy or Bondo, but I didn't have that much to waste), Get the BB barrel centered as good as possible, as this is going to define the accuracy U get from the device.
Slide a short (5cm/2Inches max) portion of the barrel onto the feed holes, not to deep (there should still be enough space for the BBs to move from The feed portion into the main barrel)