Which book does it contain?

No, there is not. You basically have to cobble together specs from Clone Soldier or Soldier to get the desired effect.

The thing about Clone Commandos is that they have different specialties, so it would be harder to make one spec to fit them all. However, I have some thoughts on the subject, so I'll see about posting them later.

Isn't that essentially what an ARC Trooper is?

4 minutes ago, micheldebruyn said:

Isn't that essentially what an ARC Trooper is?

No, an ARC trooper is a more all rounded, independent unit. A CC is a walking tank that does spec ops.

I'd recommend taking either clone trooper or commando, and then adding in vanguard. Or if you wanted a more specialised commando swap vanguard out for something else (if we're going on the game, saboteur, slicer or sharpshooter would be good options).

This was something I came up with a while ago, but haven't done a ton of thinking on it. Here's my take on a Clone Commando spec:

Resilience, Stealth, Melee, __
Physical Training Grit Toughened __
| | |
Feral Strength Armor Master - Durable __
| | |
Toughened - Quick Strike - __ - __
| | |
Heroic Fortitude - Durable Point Blank __
| | |
Unstoppable Improved Armor Master - Dedication - __

The blanks are for the squad role:
Medic (Medicine)
Engineer (Mechanics)
Demolitions Expert (Mechanics)
Gunner (Gunnery)
Sniper (Ranged [Heavy])
Squad Leader (Leadership)
Dual-Wielder (Ranged [Light])

Medic:
Medicine
Stimpack Specialization
|
Stim Application
|
Stimpack Specialization - Surgeon
|
Improved Stim Application
|
Natural Doctor

Engineer:
Mechanics
Gearhead
|
Design Flaw
|
Tinkerer - Jury Rigged
|
Bad Motivator
|
Contraption

Demolitions Expert:
Mechanics
Powerful Blast
|
Selective Detonation
|
Powerful Blast - Time to Go
|
Improvised Detonation
|
Master Grenadier

Gunner:
Gunnery
Burly
|
Barrage
|
Spare Clip - Burly
|
Ready to Rock
|
Rain of Death
Ready to Rock: When the character performs a Preparation Maneuver on a wielded weapon, the weapon gains the benefits of that Maneuver until he stops wielding it. This may only reduce a wielded weapon’s Prepare rating by 1, to a minimum of 0, and the GM may spend 1 Threat or a Despair to cause him to lose the effects of the Maneuver until he performs the Maneuver again.

Sniper:
Ranged (Heavy)
Sniper Shot
|
True Aim
|
Deadly Accuracy - Precise Aim
|
Natural Marksman
|
Targeted Blow

Squad Leader:
Leadership
Command
|
Body Guard
|
Coordinated Assault - Field Commander
|
Body Guard
|
Improved Field Commander

Dual-Wielder
Ranged (Light)
Point Blank
|
Quick Draw
|
Dodge - Quick Strike
|
Guns Blazing
|
Natural Commando

The infiltrator spec from the spy career in AoR core book seems appropriate

Also retired clone trooper universal spec from dawn of rebellion seems to fit the bill