User blog comment:Damac1214/Black Ops 2 Uprising DLC Trailer Released + Double XP on April 12th to April 15th/@comment-7756559-20130404172329/@comment-3515798-20130405195938

The weapon at 2:12 is the SCAR. If it was the HAMR, It would be zoomed in further (and the folded sights would be more obstructive).