Dude. The large AR platform, and suppressors = weight. I'm pretty much convinced (and I may be wrong), that they are strictly for the sniper world when it comes to this platform (where the hell is Stain to chime in on this). I've got an AR-10 SASS, and between the rifle itself....plus a loaded mag....and the glass that is going to be needed.....then the bipod to help support it (unless you hang it over a stump or something), then you hang a quality suppressor off of the end of it........all of that equals weight.
Now don't get me wrong. These animals serve a purpose. The very purpose why I built mine and am building another similar to it. But you have to consider the weight of these things as you're planning it. Also....that in use....you may hump these things into place in pieces and then assemble them. But still.....the weight is there. Either on the rifle, or in your pack as you maneuver.
Not trying to discourage you my man. Just chiming in my 2 cents.