S&W isn't owned by Cerberus/Freedom Group, which does/did own DPMS (does anyone know the status of the selling of FG yet, and who they still own?). Even though I originally said this thing looks to be DPMS based, it's not made by DPMS - unless S&W somehow contracted them into it, for them, outside of Cerberus/FG. I don't see that happening.
It's more "KAC SR-25" based, with it's ambi controls. In a sense, it should share many of the DPMS-based parts, but it could have some KAC-ish qualities that nobody knows about, yet. Time will tell.