Benchmark rail on a RT ULE custom?

[fuentes925]

Hi,
I curently have a classic mag and seen the offer on AGD for there RT ULE custom package. I will be getting that soon. I have a question, does the Benchmark automag rails fit the Rt ULE custom does any body know? Are the original mag rails and the Rt pro rails compatable, can they be switched?
Thanks for any help in the matter
fuentes925

[Joni]

I'm not sure about the benchmark, but you can use the original AM/MM rail, if you change the sear and on/off pin as well. No need to change the on/off pin if you get the ULT.