OK, thanks. Thinking of getting one for the SAM-R upper I have, but am wondering if the cosmetics would be worth the change. Either way, I have a Dissy build in progress and need another rifle length FF tube. I could buy the MU for the SAM and swap the standard DD 12.0 I have now to the Dissy. So many projects, so many options, so little time and money.
Thanks for the info.