No, it is exactly what is at issue here.
You were arguing that the 2nd Amendment was absolute, and that by suggesting any restrictions on weapons, I was violating it. By taking that arguement to its logical end (i.e. no weapons whatsoever are restricted), and having you agree that in that case, it wouldn't be, I have proven that it isn't absolute.
Now, we can debate on where to draw the line all day long. But I have proven that the 2nd Amendment doesn't mean what you claimed it meant.
There is a difference between arms and weapons. To favor any restrictions on arms makes you a gun-grabber.