Summary

Make your PVC marshmallow gun safer for your kids to use! Prevents choking on marshmallows through the use of a breech loader.

Instructions

First, you need a marshmallow gun. At the Maker Faire 2012, I saw the design at HowToons. He said we could buy the kit for $10, or go to the store and pay half that amount. I opted for the latter, and here is the BOM:

(1) length of 1/2" PVC (I bought 4ft)
(2) 1/2" PVC T joints, slip fit
(2) 1/2" PVC slip fit caps
(2) 1/2" PVC 90 degree elbows, slip fit

Just cut and assemble to look like the photo I uploaded. Takes less than 1 minute to make if you have those handy PVC cutters!

Now print the parts, and snap the cover onto the breech. Press the breech onto the end of the gun. Slide open the cover, drop in a marshmallow, close the cover, and fire! The mouthpiece makes the gun much more comfortable to use, and the features in the air path prevent the marshmallow from getting sucked backward and into your throat (ask me how I know this).

The breech was designed to be printed without support material (mouthpiece should be at the top when you print). So make sure you set your print parameters correctly. The chamfer is 45 degrees.

Mini-marshmallow gun breech loader