It will work, my brother has a t3x in a t3 stock. The receiver is only different in that the ejection port is larger, and the metal bolt shroud.
Only thing you might have to do is relieve ejection port cutout in stock
Not sure if that mountain tactical dbm will work in CTR inlet, or how the AICS 223 mags will feed. I do know grayboe is making a dbm that fits CTR inlet but takes AICS mags.
