I am intrigued for sure.
However, only offering a 6.5" barrel in 5.56 is just missing the mark. IMHO
My unsolicited advice to CMMG.
1) The 5.56 needs to be offered with and 11.5" barrel.
2) Work with RifleSpeed and use their adjustable gas block.
3) Make a builders kit for folks to use their already SBR'd mil-spec lowers.
4) Offer kit for around $1200 or less.
Do the above, and it will sell VERY WELL.