Here are the 3d files to print the default shotgun from Team Fortress 2. I did my best to make it as accurate as possible to the in-game model. I tried to make it as 3d printer-friendly and as easy to assemble but I do not have a lot of experience, so any feedback would be amazing :D. It's public domain so you can have fun modifying it. if you print it I would adore seeing pictures of the finished product. here is my Twitter if you want to tag me: https://twitter.com/Stimpyro

Edit: Version 2 of the bottom and top barrel assembly now has a printed bump and groove system to put it together more easily. For sizing the parts, I've noticed the base size is way too small. I recommend increasing the size by 1300% for all of them. This should give you a prop 72cm in length.