Which reflex sight is on these ATRS PDW builds?

[mopar guy]

Flipping through the pages of ATRS and saw a reflex sights on their AR15 page that I wasn't familiar with... anyone know what it is? Thanks!

(I don't know why the lower picture is rotated, came right from the ATRS sight...)

http://www.albertatacticalrifle.com/ar15.html

 

[PRO4X]

It is an ATN ultra sight.

 

[mopar guy]

PRO4X

Thanks a lot for that info

 

[BenL]

There isn't much info out there on them. Seems ATN is really geared towards NV.

Tagged for interest.