The m2 tripod (modified 50 cal) is a mount machine gun that does 55 dmg and it fires very fast.
Worth it? (proberly)
In TDM/Battlestation if u set up the gun correctly you can waste almost an entire server with it
In zombie mode like Campaign i suggest setting it up by the objective and holding it with the gun
I do not have the m2 tripod but im hopefully helping i guess