I've discovered a glitch with the Marshall. It's like the BFBC2 glitch where, if you switch really fast between your primary and your secondary you cancel the reloading animation ! I've tested out with Weapon pro (Tier 3 I think = Faster switching between secondary and primary). I haven't seen a lot of Marshall players out there, but I think that the community/devs need to take a look at this !
Link : http://www.youtube.com/watch?v=wypRCR4FuS4&feature=youtu.be