Here's an article from Military.com discussing the USMC's decision to allow Marines to shoot (some) qualifications with the issue scope. From reading the article and discussion, it seems as if this is in addition to qualifying with iron sights; it sounds like good training to me.
http://www.military.com/news/article/marin...?ESRC=marine.nl
Are Marines issued BUIS's (Back-Up Iron Sights) with their scopes?
