This is a Flatline Autococker
but this is the same body as a 2002 Vertical Feed Autococker but with modification for the flatline barrel.
This is a 2003 Vertical Feed Autococker
The summer edition - which is what this is actually a pic of came in dust colors. Standard 2003's were gloss.
This is a 2004 Vertical Feed Autococker
(not sure if this carried the prostock name) - PB review has the 2004 listed as a vertical feed and a prostock. So what is was actually called, I do not know.
This is a 2005 Prostock Autococker
The Superstock was the electronic version.
I hope this clarifies some confusion!
One last thing I swear! The hinge frame first came out on the 2003 guns. That is why I bought a 2003 as opposed to a 2002, and I like the body more.