Damn you Fulton Armory!
Today I received my Fulton Armory 308 Titan slick side upper which they call a DPMS "low" pattern. Well during the black Friday sale I bought a Troy TRX 308 rail also in the "low" pattern. The Fulton upper is NOT the low pattern, the top rail measures 3/16", not 1/8". Fulton only offers their uppers in a "low" pattern so I know it's not a mix up, I just don't know why they call them "low", I'm going to have to call them tomorrow and see what have to say for themselves.
I thought about trying to exchange the Troy rail for a taller one, but then I would have to pay shipping to and from and wait for the new one. I think I'm just going to put in on anyway since I wasn't planning to run BUIS it shouldn't be an issue. Besides, I do plan to build another lr-308 in the future, hopefully Troy will have the same sale next year and I will get the correct rail and put this one on my next build.