Here is the next member of the 3rd Gruppe 2nd Gefechtskompanie of the Galactic Knights space marines. He is wearing mark IV or Maximus power armor.
At the Mark IV stage of Power Armour development, Space Marine armour began to take on an appearance recognizable to that of contemporary Power Armour patterns, its primary change being the abandonment of the separate abutting plates of armour in favour of larger, inflexible armour casings incorporating flexible joints. This marginally reduced an Astartes’ mobility but was far easier to produce and maintain, and the suit was actually lighter and provided its wearer with more overall mobility due to the lessened weight, while not reducing the actual level of protection the suit provided compared to its Mark II counterpart. The Mark IV suit’s helmet was a completely new design, the basic shape inspired by the sweeping front of the Mark III. In Mark III and later versions the helmet was no longer fixed to the armour’s neck plates, but moved with the wearer’s head while still maintaining an environmental seal.
Here is the almost complete 3rd Gruppe: ( only 3 marines missing)
Three more to go!