If you look at the last row of the graphic displaying the preview of REQs for MoR, you will see a BR titled Assault Rifle and a SMG titled as DMR. 
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> If you look at the last row of the graphic displaying the preview of REQs for MoR, you will see a BR titled Assault Rifle and a SMG titled as DMR.
It was a mistake on the artists part. It’ll be fixed in the future.
In the legendary weapon slot, I really hope that its the grenade launcher. That weapon has held a special place for me since reach. the silhouette looks very similar to it too.
I was hoping we’d get an SMG that fires DMR bullets, that would be awesome! And OP, but that’s beside the point.