Loadout:
Assault Rifle
Claymore

Squaddie:
Run & Gun
Throw Claymore

Corporal:
Implacable
Total Combat (items can be used for 1 action)
Bulletswarm (can take standard shots for 1 action)

Sergeant:
Hip Fire (A free rifle shot @ an aim penalty)
Shrapnel (extra damage with claymores)
Walk Fire (A shot with extra aim but less crit, has a cooldown and uses 2 ammo)

Lieutenant:
Weapon Specialist (+1 dmg with rifles)
Distration (claymore kills put the rifleman back into concealment)
Cool Under Pressure (+10 aim and can crit on overwatch shots)

Captain:
Untouchable
Volatile Mix
Ever Vigilant

Major:
Extra Conditioning (Reduces the cooldown on run and gun by 1)
Highlands (+1 claymore)
Guardian (50% chance to take another overwatch shot, can chain)

Colonel:
Rapid Fire
Homing Mine (can attach claymores to enemies)
Saturation Fire

GTS:
Shake it Off (+25 dodge)