Originally Posted By donovansn585:
I'm really looking for an actual diagram of the dimensions
You might need to contact DPMS for that.
Edit: there are two types of railed gas blocks. One being same plane height and the other being gas block height. The first allows you to mount irons or optics that sit at the same height as the top of your receiver. The second one is lower, how lower you ask I do not not but it is very noticeable.