This is a mortar I made based off of the real life 60mm M2 HE Mortar round. This type of mortar round was used by 60mm mortar crews and was light, portable, and most importantly deadly. Back to the 3D model... This is 50mm in diameter meaning you can shoot it from 2 inch schedule 40 PVC (that is if you have a cannon for it). There are 3 basic parts to this mortar which are the fins, body, and fuse which are threaded so that you can screw them together. I am a WWII geek and love making stuff like this. Hope you enjoy this build.