Gomi no Sensei 3 years ago. It's complete shit against anything that has a caliber above 38. Being suddenly almost 17" taller, the helmet was a necessity. If it helps, it has been suggested in forums and such, that Mark 9 power armour was that 'variant' which was used by pre-primaris Librarians.
In Deathwatch , you can actually get your hands on some. This might be expensive. Space Marines are going to need some weapons.
Best well known for being worn by the titular Storyteller a fan made lore project that became so big Bethesda actors were appearing on it's show and is practically just short of canon now the T-49 was a prototype originally expected to succeed the T-45d by improving a number of engineering shortcomings while lowering the power cost to keep the suit running. If you don't have a vacuum former, and you don't want to spend thousands of dollars on a professional machine, you can build your own.
Virtually identical to Space Marine power armor, these suits of armor are scaled down to fit regular humans notice that this is the reverse of what it would have been 10,000 years ago. It's best to work in an outdoor area and you'll still want to wear eye, hearing, and respiratory protection.
It was also equipped with an extra pair of limbs called "Snake Arms", very strong robotic tentacles mounted on the shoulders that could also shoot "plasma" missiles.
Making a person look bigger in costume is a challenge in maintaining proportions.
Artificer Armour can be formed from any older mark of Power Armour perhaps barring Mk. More visually distinctive is a model of power armor worn by Firebats. The stilts were made out of steel. Take it for formal occasions.
One is a human full body armor designed to allow the wearer to fight in vacuum. Like their stripped down plasma rifles they are designed to be easier to maintain and build, most likely due to losing most of their resources and production facilities after the war with the NCR. The Hellfire armor further suggests that the enclave are attempting to close the gab, combining the cheaper more agile qualities of the newer design with the protection of the earlier designs.