Star Wars: Legion - B1 Battle Droids Unit Expansion
Star Wars: Legion - B1 Battle Droids Unit Expansion - Rules of Play says:
Create a massive droid army with the nine highly-detailed B1 Battle Droid miniatures found in this expansion! Seven Battle Droids can lay down heavy fire with their E-5 Blaster Rifles, while a B1 Trooper with an E-60R poses a threat to enemy vehicles. Finally, an E-5C B1 Trooper adds even more firepower to your battle droids in their quest to bring down the Republic.