If you want to build a fielded M6A2, the Magic Factory kit will not build into it. It does not include the armored Stinger box nor the IFF receiver. You would still need the Model Monkey set. Also, you would have to backdate it to an M6A2.
The best bet is to get an M2A2 ODS kit and add the Model Monkey parts. I would go with the Magic Factory M2A2 ODS-SA Ukraine kit and leave off the SA parts. See the below post to see what to leave off.