What they'll do is say semi-autos are outlawed, and 90% of law abiding people will turn them in thinking they still have their pistol/shotgun. Then they'll make shotguns illegal, and again 90% will turn them in. Then the same with high caliber pistols, then all firearms. By the time people realize this will not stop, 90% of the guns are gone! Now they only have to go to a few houses. After a few televised slaughters more holdouts turn in their guns. Through snitches and rewards, neighbor will turn in neighbor and they will come to houses unannounced and take your life or your guns. By this time, only the criminals could fight back, and they will likely be bought off.