M14 Rail Idea

Here is a rail configuration I hadn't considered for my own uses:

I wonder how stable that is? The back part of the rail the rear scope ring is mounted to is a single dovetail notch forward of the peep sight, and the front rail part is a around the barrel. Seems like there could be some variance introduced after firing for a bit, with all the vibrations. This type seems a more secure platform:

But the top gives me another data point to think on.