I can't help you. I've be playing ghosts so much, and have gotten really good, that I can't aim well anymore with the 360 controller or play BO2 effectively. No more VSATs and Swarms for me :(
But what I will say... Do the M27 first. After you finish and move on, the game will feel like easy mode now that you're using a weapon that's actually halfway decent. --- GT: EdwardDarkstar Be afraid, be very afraid of the Dark.