Got four Atlas 2750 cuft PS-3 coal hoppers today, in undecorated. Very nicely done. Fine ladder and stirrup tooling; separate detailed brake hardware, bay doors and end bracing; body-mounted couplers that accept MTL 1015 knuckles. The body of the model is a four-sided plastic "box" with the bays, sloped sheets and centersill being diecast. The bottom bracing in the ends are separate plastic pieces, and the coupler boxes appear to be integrated with the centersill. The model comes with standard Atlas trucks, so FVM 3602 wheels are the metal upgrade.
The components are not glued together. But as with some of the intricate Kato models, it will take a little time figuring out how to disassemble it.