The upper was built using the 11.6 barrel off of my mrr and putting it in an sas 10.5" upper. Milled off the grenade lug, built the correct ops Inc suppressor collar and assembled it all. The collar fits right on the 11.6" mrr barrel. No messing with it. Luckily I had a friend with the correct suppressor collar so I could make drawings to replicate it.
Just waiting on my black exps to put on there, tape everything off and giving it a fresh new look. Hopefully in a week or so. Will post pics when finished.
Almost forgot to give a shout out to Brad at Nordic. Always my go to for CC/Diemaco parts and always fantastic service. 99% of this setup came from his shop.
Thanks for the comments.