With that said, let's talk about what "middle ground" means. To my mind, "middle ground" ought to mean the midpoint between: (a) anybody can own anything they can afford, no restrictions whatsoever; and (b) no civilian ownership of firearms whatsoever. It seems to me that we're already beyond "middle ground" and closer to (b) than (a) as it stands today.
I think that's a fair definition of middle ground.
In my estimation, though, we've never come within a country mile of (b). In fact, with 200,000,000+ firearms out there, it's hard to draw any other conclusion.