heres a troy one i did the other day took 30 mins of work
I cut off the delta ring and like the cheapo i am i cut off the a2 front post and shaved it down to a low pro gas block
see
you can see the gas block is a little shiny i need to paint it still
and there you have it a complete rail on top
this is what it looked like before i got my hands on it
[IMG]http://i44.photobucket.com/albums/f49/Evollep3/IMG_0936.jpg[/IMG