This is the Loyalist squad that I'll have fighting in my Istvaan III games. I wanted to give them a pretty ragged look so they are a mix of MKV and MKII armours and some of the guys even have pieces of armour from other legions where they cobbled their armour together.
I gave them a mix of chain swords and axes to represent scavenged weapons to replace damaged equipment. There isn't a dedicated sergeant. One of the guys will be a vet sgt. but he will have a chain axe rather than a power weapon to represent the lack of resupply available to the loyalists.
I've had the MKII guys finished for a while. I bought them at Adepticon last year and finished them over the summer at some point but now they are reunited with their comrades to make the full squad.