User blog comment:Bovell/Lots of new Battlefield 3 details via Twitter, DreamHack festival, PSM3, and interview/@comment-108.15.96.236-20110624193832/@comment-75.111.12.34-20110624220121

It is a Mk 11 and if you go to wikipedia and type in Mk 11 it pops up the SR-25 and the SR-25 on wikipedia looks exactly like the in the picture.