According to the AAC Blog it’s a drop in monolithic upper for the AR that uses the ACR piston system…
…so you can’t get a Remington ACR, but you can get…this?
That is pretty f*cking cool. I wonder if it uses a similar bolt/carrier design as the ACR or if it’s more like an AR15.
Another cool potential is that I may be able to work with a RDIAS.
If it is a new bolt design instead of a piston driven AR bolt, that could be very promising…
Anybody have any information about this?
ugh i still see a charging handle in the back… SERIOUSLY DOUBT ITS ACR LIKE
If it is a new bolt design instead of a piston driven AR bolt, that could be very promising…
Agreed, another piston AR upper is hardly news, a truly different lockwork is big news.
It does LOOK cool.
What’s the barrel twist? 
It’s Remington, so 1:7, but it’s only available to military and select federal agencies.
WHOOT!! might have to put off the jeep for this bad boy 
looks amazing and cant wait for more info!
This is strictly my speculation, but I’m guessing that it is similar to a regular AR bolt because you can see the area in the upper for the cam pin to rotate.
Very cool!
I see a Remington upper loaded with Daniel Defense accessories; interesting, were is the Magpul love?
Your observation makes me think that it is just another piston AR. Still, I guess it is possible that the bolt lugs could be redesigned…
More info wanted, please
evil looking barrel shroud
yea…looks BS to me. i’ll await the commercial ACR.
firearms blog posts says its based off ACR gas system but just modified for a AR upper