I hope common sense prevails and you get to keep your LEO trade-in MP-5.I have a KB date code MP5 police trade-in. It was transformed to semi-auto by the police and that makes it civilian legal where I live in Europe (for the moment - A new European gun law makes all guns that started life as full-auto, and quite a few originally semi-auto rifles, illegal for civilians. The new law permits each member country to allow gun owners to keep these weapons, if they were legally purchased before June 13, 2017 - I got mine on June 12, though I reserved it and paid for it months earlier. However, at this point there is no guarantee that we will be allowed to keep them. It basically will come down to whether or not the government thinks it can get away with confiscating the guns without having to reimburse owners for the loss of their private property. In France, where I live, they are currently trying to do this to owners of belt-fed guns - semi-auto only of course. They are trying to get around having to reimburse the owners by telling them that they are free to sell their guns to any of the 2-3 gun shops that are allowed to deal in military and LEO only weapons. Since they can sell them to a gun dealer, the government is technically not "confiscating" them, but why would a gun dealer buy guns for which there is no resale market?)
Like most LEO trade-ins, my MP5 doesn't look like a safe queen, but it shoots well and feels tight.