Wanted a Catapult that was more like the classic design, all the STLs I could find were based on the 'modern' MWO/MW5 design, so I tried making my own in Tinkercad. Borrowed the legs from some existing model, and remodeled some existing LRM pods, but I made the torso from scratch. It's maybe a bit minimalistic, but at Battletech scale you don't need to be hyper-detailed.

Includes 5 different 'complete' assemblies, plus versions with no Arms and separate pods if you prefer things that way.

Basic has open doors and missiles modeled 'Tubes' has open doors, but just holes in the launchers No Doors, but with missiles. No Doors, empty tubes. and the FATapult is upscaled a bit to match the dimensions of the old PlasTech model, but only comes with the No Doors version standard, but there is a No Arms version if you want to use some of the other pods.

Sorry, but there is no complete assembly for the Closed Door version because 3d Builder apparently shared my lack of enthusiasm for that variant and refused to resolve the model for some reason.