Their gasblock design is what gives it supposedly the only truely free floated barrel for a piston ar, according to them of course
And they're correct.....to a point.
The thing about "working guns" is that where **** can work its way into, it WILL.
Barrels flex during firing. Not a lot, but they do. Now imagine a working gun and all the subsequent use that comes with it. They get gear dropped on them, they get bumped around, they get dirty (not just from being shot), they have all sorts of stresses placed on them.
How would you like a gun that had some piece of detritus or gear get wedged between the fancy gas block and barrel that opened up the port and allowed gas to escape, thusly turning your gun into a single shot rifle?
Now, I don't know if that is exactly what would happen as I have no working knowledge of adcors gun, but these are potential problems that I see and would prevent me from making such design choices.
In my personal opinion, any mechanical piece of equipment that is meant for general use by a large number of users with a wide variety of skillsets and different levels of knowledge about the machines in question, I would go for simple, durable, and reliable before I tried tweaking crap like making the barrel free floating for some supposed gain in accuracy.
And about that....if these things are meant to be such great "working guns", why are they concerned with making the gun more accurate then the shooter in the first place?
Just seems like an answer to a non-existant problem if you ask me.