A basic 3d-model of Uzis Railgun from the webseries Murder Drones This includes a full model and one split into 9 parts for easier printing and assembly using 4mm rods at full scale it's about 136cm long and each part fits in a 20x20x20cm printer with 4mm support rods but it can be scaled and remain well printable with all of these numbers scaling proportionally - there's enough tolerance for the support rods to go up/down in mm steps