The Engineer Battleframe relies more heavily on help from robotic minions for dealing with enemies than his own weapon damage. Engineers serve as more of a support class than anything else with a plethora of abilities that are used to help a team secure objectives, but can still throw down with the help of his turrets.
Weapon:Repair Gun - The Engineers guns rarely do very much damage, but are capable. They are medium to low damage weapons. Primary use is really to repair your robots and abilities.
Abilities:Turret: The Engineer Battleframe summons a turret that shoots at enemies that are in your SIN. This is your primary damage dealing ability.
Forcefield: The Engineer Battleframe lays down a force field that blocks enemy bullets. Friendly players can fire and pass through the force field.
Repair Station: This station is a lifesaver in PvP and PvE. The Engineer Battleframe lays a station that heals allies around it and charges ammo and energy.