The top marker is the original rudy dean cocker (which I do not and have never owned, I borrowed this picture).
The raw body at the bottom is the later rudy dean version of the autococker. This is just like the one I have. It is a project in the making. I am sure you have noticed the huge air chamber sticking out of the center where normally the front block scew would be located. The air enters the marker through the end of this massive chamber. I am sure you have also noticed that the front block is integrated into the body. With this design there is not a place for a low pressure regulator to mounted on the "front block". This marker was designed to run a female stabilizer for the bottom line asa and the lpr vertically to serve as the fore grip. It has also been stated that is was designed to be run at 145 psi, lets talk about low pressure. I can't wait to get this one completed.