UC armory gives a major Lore-friendly retexture to every faction and sub faction of the United Colonies 
 
Acquiring: UC Marine gear can occasionally be found in the game world to loot or buy.

I recommend the mod UC Surplus Stores Expanded, which adds all UC spacesuit variants to UC Surplus stores in Cydonia (Mars) and The Well (New Atlantis).

Alternatively, you can add using console commands, replacing ******* with the codes below:

player.additem ******** 1

SPACE SUITS
00398104     SysDef Assault Spacesuit
0039810A     SysDef Combat Spacesuit
00398108     SysDef Sec Recon Spacesuit
00398103     SysDef Spacesuit
00398107     SysDef Armored Space Helmet
00398106     SysDef Space Helmet
00398105     SysDef Pack

UC Navy Uniforms
003329B4SysDef Formal Uniform
0021C1FBSysDef Officer Uniform
00108353Ikande's SysDef Officer Uniform
003329BBSysDef Crew Uniform
003329BCUC SysDef Crew Hat


For the blacked-out visor, I recommend Space Helmets - Dark Visors by Xtudo, selecting the 'UC Marine' file.

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Installation (Main file):

1: Make sure these lines are in your StarfieldCustom.ini in "Documents\My Games\Starfield\"

[Archive]
bInvalidateOlderFiles=1
sResourceDataDirsFinal=

2: Download the mod via mod manager (I personally use Vortex), or manually download and extract to your Starfield directory, ensuring
the folder structure is: "\Starfield\Data\textures\clothes\..."

Credtis
MonkeyChief117: For allowing me to use some of his ideas and textures on some part of my SYSDEF Armor, I highly recommend checking his mods out