I have had a couple people ask bout the rail on mine, so I thought I would repost the topic. Chef Dennis can pitch in here as he has done one also. I saw the rail stock on Ebay, also available from here - http://egw-guns.com/catalog/ for about $30, and thought I would give it a shot. It worked out pretty well, it does flex with the cover if you warp your hand around it, but left to float, it doesn't move enough to mess with the front sight, though I wouldn't mount an optic forward of the receiver. Total cost would be as much as the whole rifle with the iron sights included, but there are option to that to bring the price down. For the black rifle guys, it does co-witness with the ATN Ultrasite shown in the lower quadrant of the sight. The company above sells in precut length of 16" rail and is long enough to go the length of the stock forearm, I cut 3/4" off the front and still hung it over the back 1/4 to 3/8" . I left it float because didn't want it any harder to disassemble than it is with the ATI stock, which is why I left it float. The top handguard just has enough room to slide in under the rail so you can take it off without having to loosen the receiver cover 1st. I drilled divots in the bottom to fit the bumps on the receiver cover, drilled an extra hole in the center of the receiver cover and used 3 10-32 button head machine screws into tapped holes of the rail. The rail comes raw in the white, you need to finish it, anodizing would be great, but I didn't have hat option, I used Brownell's baking lacquer. It really isn't too technical of a project. Some trail and error fitting so the rail stock sits flat and solid. I bought an extra receiver cover, which was a good thing since it fit tighter. Just make sure the holes drilled in the rail are centered so the rail is straight and take care when tapping the holes in the aluminum. Just a couple side notes, the rail on the bottom is just polymer rail stock from Falcon industries, I installed it flush to the stock, the forward rake doesn't bother me on the forward grip. The barrel shroud is a 10/22 barrel shroud I ran across cheap, I reversed it, removed the swivel band and clamped it down withe the set screws.