highly doubt any of them actually own assault rifles, as its extensive and expensive and not worth it. now Armalite 15's i personally have 3 in my house, not all mine, we have 2 pistols and 3 shot guns. The issue we have with bans is that there are so many ways to work around them. For example, if you ban bump stocks it doesn't stop someone from doing another action to simulate it, like you can with a simple belt loop and shooting at the hip. If you ban AR15s you have to ban anything close to it, that could includes guns like the mini 14 that would stay legal under current talks. After a while you try to take all rifles, and thats the exact threat the second amendment would stop, which would have more violence as the owners will fight back.
I think another interesting topic is tho, that there are a lot of people on the democrat side that say trump is a dictator/ running a tyrannical government, so why would you hand over your weapons to a person you compare with hitler... If someone can give me insight on that, that'd be great