Headshot Fire a shot with +30% critical chance and extra damage on critical hits based on the tech level of the sniper rifle. 2 turn cooldown.
Corporal
Snap Shot Removes the sniper rifle's restriction on firing and Overwatch after moving. Any shots taken suffer a -20 Aim penalty.
Squad Sight Allows firing at targets in any ally's sight radius.
Sergeant
Gunslinger Confers 2 bonus damage with pistols.
Damn Good Ground +10 Aim and +10 Defense against enemies at lower elevation in addition to the usual elevation bonuses. (including while flying)
Lieutenant
Disabling Shot Allows the Sniper to fire a shot that causes the target's main weapon to malfunction. The target may use Reload to fix the weapon. The shot cannot inflict a critical hit. 2 turn cooldown. (-10 Aim, reduced Damage)
Battle Scanner Scanning device, when thrown creates a new source of vision for 2 turns. Can only be used 2 times per battle.
Captain
Executioner +10% Aim against targets with less than 50% Health.
Opportunist Eliminates the Aim penalty on reaction shots, and allows reaction shots to cause critical hits.
Major
Low Profile Makes partial cover count as full.
Colonel
In The Zone Killing a flanked or uncovered target with the sniper rifle does not cost an action. (applies only once to Pistols)
Double Tap Allows both actions to be used for Standard Shot, Headshot, or Disable Shot, provided no moves were made. 1 turn cooldown. (Can't be used with Snap Shot)