Sci-Fi Marines in an exoskeleton

We designed a few characters for a Sci-Fi shooter. There are several imperial power armour designs tailored for different roles. The Heavy Gunner and the Storm Trooper have reinforced knee pads and extra plates to withstand melee onslaught from hulking beats. Also, they are equipped with next gen heat vision helmets and elbow blades. The Enforcer has the lightest exoskeleton that allows to achieve higher mobility, while the Sniper has an extra magazine.