I'm a soldier with many "personally owned firearms" many of them (most) are on the projected target list posted earlier today, and frankly, I would have deep moral issues with confiscating weapons from civilians, however, if we are ordered to do this we have to, regardless of oath's we've swore we still can be prosecuted under the UCMJ unless an order is immoral or unlawful. Bottom line, LEO's and Soldiers have to listen to the people who sign their paychecks.
I have a buddy who's career, and we had this conversation, which is what made me post the question. He's not sure what he'd do, and like you he would lose a lot of weapons. I don't know, it's strange days, and it looks like they're not over.