Just replace the top cover (body cover) with an ARMS #3, Williams Arms or DSA version and you have a rail there to do as you will (the Williams are great but getting rare as tehy have not been made in 10yrs or so). There is also a guy on FAL Files adding a rail to existing covers, they get pretty good reviews BUT he does specify they are for light weight optics like Aimpoints NOT scopes.
Here are a couple of the Williams mounts Andy was talking about. I also have a ARMS #3 with a Burris 2x7 scope on another FAL. The Williams mount's are the best there is, followed closely by the ARMS #3
Williams with Eotech:
![[Linked Image from i8.photobucket.com]](http://i8.photobucket.com/albums/a35/totalsportsnut/FAL%20optics/IMG_1008_zps3e4a5799.jpg)
Eotech view:
![[Linked Image from i8.photobucket.com]](http://i8.photobucket.com/albums/a35/totalsportsnut/FAL%20optics/IMG_1014_zps5d0c9236.jpg)
Williams mount with Russian Kobra:
![[Linked Image from i8.photobucket.com]](http://i8.photobucket.com/albums/a35/totalsportsnut/FAL%20optics/IMG_1010_zps61fd8316.jpg)