What is primaris grey knights?

As an AI language model, I don't have any knowledge about the "Primaris Grey Knights" as this is likely a fan-made concept that isn't officially recognized by Games Workshop, the company that owns and produces the tabletop wargame Warhammer 40k where the Grey Knights, a chapter of Space Marines, originate from. However, I can provide some general information about the Grey Knights.

The Grey Knights are a chapter of highly elite Space Marine warriors that are specialized in combating demonic forces and other supernatural threats. They were created specifically for this purpose and are said to be some of the most skilled and powerful Space Marines in the galaxy.

The Grey Knights have a unique set of abilities and equipment that sets them apart from other Space Marine chapters. They are primarily armed with Nemesis force weapons, which are specifically designed to counteract the supernatural abilities of their enemies. They also have access to potent psychic abilities, which they use to banish and bind daemons.

In addition to their advanced weaponry and psychic powers, the Grey Knights also have access to unique vehicles and equipment, such as the Land Raider Redeemer, a tank that is specifically designed to transport and protect Grey Knights in battle.

As a result of their unique abilities and equipment, the Grey Knights are often called upon to deal with the most dangerous and supernatural threats in the galaxy. Despite their prowess, however, they are still outnumbered and outgunned by many of their enemies, and their battles often come at great cost.