I unlocked the medic gun,and its ok,but not brilliant.The accuracy is superb on it,and its extremley effective at long range via the scope,I have regularly taken out snipers who took a pot shot at me but at close range,which lets be honest,is when your gonna be using it most as a medic , it lacks power and I find myself constantly getting owned by assault guys with their big guns
Ive tried the sniper a few times by picking it up off the floor and it seemed ok,got a few 1 shot kills but I only really play as sniper when Im playing on my own so dont think I will unlock that next cos I probably wouldnt get the most use out of it.
The anti tank unlock is lethal upclose,extremley rapid fire shotgun type thing,but at distance it's practically useless,so as long as you dont mind switching to your pistol for any medium/long range shooting this may be worth a look.
They are the only ones I have tried myself really,so cant comment on the others.I think I might go for the engineer gun cos I do play that class quite a bit and the US shotgun sucks.All I would need then is for EA to sort out the whole tk/punish thing and I would be laughing.I cant tell you how much it annoys me when idiots drive into mines I have laid then punish me,getting me kicked/banned from servers!AARRRGGGGGHHHH
If someone is dull enough to drive into a mine to to carelessness/stupidity is is them that should be punished not the hard working engineers like myself