Melee Coordination & Strength.
Ranged Coordination & Firepower. Attacks at Long Range suffer a -2 penalty.
Critical Success: Gain +2 to Deal Damage or to Maneuver,
or choose to Deal Damage twice against the target,
or choose to Attack another target with a -2 penalty.
Success: Deal Damage or Maneuver the target.
Failure: The attack missed.
Critical Failure: The attack may Deal Damage to another target,
or give the target of a Maneuver a +2 bonus.

Other Stats may be used depending on the circumstances.
(For example: Ramming uses Coordination & Speed.)