Rail Identification help

[fsrxc1]

Hey guys,

I was poking through the shop the other day and found a big box of mag stuff. So i took it home with me because it's been there forever...anyway I found these 2 rails....are they RT rails or Emag rails? or something else...i know the are Lightened and have a ton taken out of them...any help would be great

[behemoth]

Raw ULE emag rails.

[fsrxc1]

Thank you very much