goinpro

I tried searching for an answer to this as well as emailing both manufactures to get an answer. I am wondering if I should order the DPMS low or high profile TRX battle rail in order to best match up with the Fulton Armory Side-charging receiver. Fulton said they use DPMS "original height" and to contact Troy however I have not heard anything back from Troy. Does any one have any idea or has done this combo yet?