These Senate Commandos are appearing in set 8128, Cad Bane's Speeder. There's the regular, rank and file Commando and the Commando Captain who is making a LEGO debut with this set.
Minifigure Parts and Accessories
The regular Commando appears unchanged from the variant that appeared in set 8039, Venator-Class Republic Attack Cruiser. The breakdown of parts can be found here.
The Commando Captain features the same parts; however, there are additional markings on the torso and helmet to signify his rank. The reference photo seen here is of Senate Captain Jayfon. Note that his full armor features more markings on the arms, legs, and crest. Nevertheless, the spirit of the original is captured in this fig.
The accessories with these figures are the long blaster rifles (part 57899)
Army Building Potential
The ABP for this figure is high. Like Clone and Stormtroopers a squad of commandos would be nothing short of cool. Given that the price point for this set is lower than the Venator, and you get two Commandos in this set, the potential to grow your units is stronger.
A rare minifigure and a brand new variant with detailed print. What's not to like?