DD(Destructive Devise)....anything above .50BMG
....yep....DD's are transferable and can also be manufactured currently. Got a Lathi in .50BMG in a trade and sent in the $200 to get it restored in 20MM. It took the bastards over six (6) months and several,as in seven (7) phone calls, to finally get the paper work back. But I now have a Lathi 20MM that shoots the current US M103 20MM Vulcan rd. Also load these puppy's....its the only way I can afford to have it.....