A set containing a mining cart, a connector (making it possible to attach multiple carts), a railway segment (which can be repeated endlessly) and a wooden brake, to stop the cart, fully unwrapped with non-overlapping UVs and with PBR setup (game-ready), tested inside UE4 and Marmoset Toolbag (images attached). You can also find the UE4 project for sale in the marketplace.
The download contains:.MAX (version 2015).MAX (version 2018).OBJ.FBX
Hope you like it, and don't forget to take a look at my other models, some of them may be useful!