I grabbed a DPMS 16" optics-ready carbine recently.
As Dhawkins01 mentioned, he asked on Sig and Bushmaster. They were both in my local Dunhams. Did not go back lately to them, looks like Dunhams pulled guns from their flyers.
A few weeks ago there were more choices at LGS. Picked the DPMS from smaller pickings a couple weeks ago. Since then, the choices have been none to a couple each day.