Confiscation takes money and bodies, as long as the purse strings are held tight a gun grab is just not feasible. Heck they can't keep guns out of criminals hands. Another problem is the military are also gun owners, there guns will be confiscated first, IMO. Their families guns would be confiscated they will be in the position of having to choose the government or turning on somebodies family, that also have military if not their own families, and friends. Some troops in NOLA outright refused to take part in the gun grab after Katrina. Then there are the outright logistics of going from home to home in America, not like this could be done overnight, and without word getting out. It's one thing to raid a criminals house, another to start going door to door like the Nazis did. Their plan is to do one little step at a time, they are hoping for cooperation from the dupes, and they will get some of them to cooperate, maybe most of them. I do believe when the time comes to disarm all citizens there will be a continental congress stripping the executive branch of it's powers, and returning them to Congress. Congress can stop this quickly by cutting purse strings, if they have the balls.
Drastically reducing the size and budget of government is the answer to these power grabs. But the entitled are too easily led to slaughter by free stuff. Our efforts should not be just the 2A but the reduction of government.