This is powerful tool meant for daily office use :)
It can be used in many situations to help you with conflict solving, punishment, or just pure revenge.
How it works:
The handle of the lower part easily warps, so I recommend to use a heated print bed.
Mount the upper part with the lower part as the black gun shows in the picture.
Mount the sides of the handle and the spring from the clothespin as shown.
If needed, fill the handle with something heavy (eg. led from your fishing gear).
Pull the sled fully backward and forward, insert the match and pull the trigger.
There is an optional challenge here. The gun can be equipped with a spring from a ballpoint pen to make the sled automatically enter its resting position. In this case the flexible tounge above the barrel of the lower part should be broken off. The spring should then be mounted in the small void between the rear end of the lower part and the 5 mm inset on the upper part. This step i quite challenging..
Note. This thing is not harmless, so dont shoot at anything alive.
I also provide the sketchup file in case someone needs to make adjustments or a remix.
PLA, heated bed, no support
Grip may need scaling by 1-2% for a perfect fit