Thought I'd throw this in the forum. Bought it a couple years ago from a 72 year old man. He had owned it for some time and as far as I know it started out as a M3. After WW2 it was taken back to the factory and converted into a m16 Quad 50 carrier for Korea. The floor mods still remain and it has the circular bolt pattern for the Maxon as well as the spare barrel holders and the tombstone racks. After Korea it found it's way into private hands and at that point the pulpit was added for the Browning 50. It remains a hybrid or sorts as she is but I'm planing on fixing her back as a M3A2. Hopefully I can get started in the next year.