Gents, before doing a deal, look at the respective parts TM's and compare part numbers/NSN's. Will not take all that much time, and may keep you from screaming.
Just looked a few things up. Brake shoes are the same. Brake drums not. Then looked at axles. Not the same. You also need to know that there are three different types of "M105" trailers. In the TM for the M105 type trailes, there are two axles listed. One axle fits two of the trailers, the other axle fits the third trailer. The axle in the TM for the M200 trailes has a compleatly different part number then both the M105's axles. I did not look any farther.