The role of the support gunner and designated marksmen are similar. The support gunner provide fire support in a large area and helps suppress with sheer volume of lead. The DM is meant to provide fire support on an individual target instead of an area and suppress with accuracy. Also... take a scope off a gun? Don't you have a MP7 for that? Also, the M110 isn't really a marksman rifle... It's a bit too big and heavy for that. I was under the impression that the "Virgin" was a marksman with his M14.