Aggressor

The horrifying bastard lovechild between a Centurion and a Terminator.

"Clad in heavy Gravis armour, Aggressor Squads advance on the foe as walking fortresses of ceramite. More mobile than some other Space Marines, they’re better able to negotiate rough ground, making them versatile troops; while they are often employed in specific circumstances or on certain terrain, Aggressor Squads are used as reserves to plug breaches in gun lines or to spearhead an advance. The range of their weaponry is not too long, but when they get close enough to open fire, the result is a sweeping fusillade of large-calibre bolter shells that can shatter enemy charges." ~Games Workshop

An Aggressor, who is usually a member of an Aggressor Squad, is a new type of Astartes heavy combat support specialist unique to formations of Primaris Space Marines. Aggressors are tasked with heavy long-range fire support and have been outfitted with modified suits of Mark X Gravis Pattern Power Armour refitted to carry shoulder-mounted missile launchers that can be automatically reloaded from internal stores within their battle-plate. They also wield Flame Gauntlets that unleash blazing streams of Promethium upon any foes that get in close; the Salamanders in particular are fond of this setup, and have put it to good use on many occasions.

Aggressors are basically the Primaris equivalent to the normal Space Marine Terminator Squad or Centurions. However, when it comes to their armaments and defenses, some has basically placed them in-between that of a Terminator and Centurion. Aggressors are noted for their extremely awkward armor even for the standards of Primaris Marines. Whilst it may not be as comically bad as the Centurions or heavens-forbid, the Dreadknight, it does gain a bitching or two from certain disgruntled elegan/tg/entlemen. This could be due to their bizarrely oversized powerfists that is considered as too cartoony and ridiculous even by the standards of WH40K. Combined the giant fists with the comically skinny legs and the skull covered "rod" hanging between them and you get a unit that will spawn a dozen 'interesting' discussions.

Equipment

Aggressors are armed and armored with the most advance and effective wargear churned out by Uncle Cawl and Grandpa Smurf.

Aggressors wear the modified Mark X Gravis Pattern Power Armour which includes an automated loading system for a built-in Missile Launcher. Two Boltstorm Gauntllets which is basically a Power Fist that incorporates a Bolter and is used by the Primaris Space Marines, combining a potent melee weapon with the capacity for excellent ranged damage.

For better CQC assaults, they can swap the Boltstorm Gauntlets with the signature Flame Gauntlets which are a new type of Flamer Weapon that practically follow the same design of the Boltstorm Gauntlet. Flame Gauntlets are designed to unleash blazing streams of Promethium upon any foes that get in close. Though their units are intended to provide heavy, long-range fire support, Aggressors use Flame Gauntlets to slay any foes who move into close combat range. Oh yeah, they also carry a Fragstorm Grenade Launcher, but nobody would really care for it since the other options like the Missile Launcher kind of does its job better.