the at-x chassis will run a lower profile vs axsa. from the video eurooptic put out, the base at-x will not have quick adjust on the stock, the stock will be fixed(non folder) and the top bridge of the handguard will not be included. but it will have comp trigger. so if you buy an at-x at $5k, but want a folding knuckle, or the top bridge of the handguard (or the co-planar rail on top of that bridge), those would have to be purchased separately.
watch the europtic video posted earlier. they hit on most things not included in base at-x
watch the europtic video posted earlier. they hit on most things not included in base at-x