Anti-Tank rifle- engineer and maybe assault should get an anti-tank rifle either as a gadget (similar to RPG/Talons), or as a standalone weapon. I envision it dealing 10% damage to tanks, and instakilling enemies. Instead, it could deal more/less damage to tanks depending on where the bullet hits. To balance it, it should have a low rate of fire, inability to use the suppressor, and be unlocked at level 9-15. It could also have to ability to utilize sniper scopes.