Yes they will. When faced with death or lengthy prison sentences for possessing a firearm most will get rid of their guns. When doors start getting kicked in and families shot by police, only to have the media portray them as dangerous militia types and terrorists for daring to own a firearm you will see most people turning in their guns.
The vast majority of gun owners don’t want to go to prison or disrupt their comfortable lives. Their gun is mearly a possession, and while the loss of it would be unfrotunate, they don’t believe it’s worth killing over.
As far as other means of revolution, it’s all a matter of what’s most effective. Going head to head against a military force won’t result in many victories but in heavy casualties. One man with a truck bomb can do more than 100 men with rifles.
Why would anyone go head to head with a military force...what makes you think it would come to that? How many of the military will decide that they will not follow unconstitutional orders? How many police will participate in confiscation when they have to come home and live in neighborhoods where people know who they are?
This isn’t the Wiemar republic and this isn't Germany. The American people aren't servile Europeans, we were born from rebellion to tyranny, and we will answer the call again if we must. While you may have lost your faith in your fellow Americans I have not.