Originally Posted by t0adp1p3
Because it has a marker telling me to be there, and you know how these games are, I am afraid to go off the path it wants me on and be stuck shooting endless waves of re-spawning bad guys.
I ran up, went prone, grabbed it and ran for the other end and went down the stairs on the other side and used the stairs as cover. You'll need to clear a wave or two and then move back towards the building when they tell you to regroup. You are totally exposed on the walkway though so don't stay there. This was after dying several times trying to use the gun on the walkway.