Hi, This is the MTH - 20-97427 Burlington Northern 50' Airslide Hopper Car #410312 WITH EOTD end of train device added.
See pics and video. I am not sure why, but whoever add eotd forgot to put the screws back on the secure the body to the frame. (4 small screws.
It is tight fit, so probably can use without. I almost did not notice. 
See pics and video.

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