New here, but I've followed this thread (and Mech Warfare) for a good while.   I attend the United States Military Academy and it is branch week here. Armor brought an M1A2 SEPv2 which, while awesome and cool to get inside of, was nothing new. However, they had a cutaway of a M829A4 round, which was on public display so it's not breaking OPSEC. Thought it would interest you guys.     Edit: I have no official measurements but I've looked at some photos of M829A3