That upper sure looks like the ones that RND Manufacturing makes.
The lower looks like it must be just a Pre-ban lower and I don't know about the stock. I know I have seen them before but don't remember where now.
RND web site is WWW.rndedge.com I haven't been to it in a while so I don't know what happened to the rest of the site but they used to have some pictures of uppers just like that on there.
You can email them to get more info from them their address is on the homepage.
I have been to their shop and checked out their rifles, They are very high priced but I think they are well worth it.
The way they work is the bolt carrier is about half as long as regular AR carrier and the buffer spring is above the carrier in the upper receiver.
One other thing RND does have a connection with Rocky Mountain Arms, They made the lowers for the pistol AR's before the '94 ban.