Mark 4/Maximus Armor

Created after all primarks where found but before the Haresy. Unlike the Mark 3, the Mark 4 was designed to replace the Mark 2. Although not as durable as the Mark 3, it is just as durable as the Mark 2. Not only that, but it is lighter then the Mark 2 and has more advanced technology. However there is a big issue. Out of these 3 early versions of the space marine power armors, it is by far the hardest to repair. As such it failed to be a worthy replacement for the Mark 2. Only fast leageons that didn't expect to be hit used this armor. All other legeons stuck with Mark 2's and 3's.

The Mark 4 has a more rounded helmet. It has tubes leading from the bottom of the mouth part to flat, round peices of metal where the ears would be. There are 6 indented lines slightly slanted downwards on the mouth piece. There are 2 eye holes covered by red protective glass. There are no metal rivets on the armor. Besides that the body looks like a slightly less chunky version of Iron Armor.