There are the choosenmen of the 20th Praetoria, called the "Black Watch". There are two Squads of special forces and veterans of the Regiment. They have similar some special equipment and weapons. I use them as an 3rd Platoon of Regiment, an Special Task Command Force ore as old veterans. There are the pics of the first Squad.
"The 1st Black Watch"
Drum-Major and Company Sergeant Major
The "Regimental Butcher", a Colour Sergeant and the Squad Sniper
The Lieutenant (count as Sergeant) 1st Squad