Xcom 2 Outfits, The arms are located in it's respective category with options for Arthur's arms or XCOM arms.

Steam Workshop::Xcom Preset_Outfit

One say XCOM operatives should look like insurgents, not regular troops in glossy uniform. So, here's my vision. First bunch of my AVGR-43 crew : r/ Xcom

Putting XCOM 2's Customization To The Test

Steam Workshop::[WOTC] RDR2 Arthur Morgan Squadmate (v2)

ADVENT Shieldbearer, XCOM Wiki

Steam Workshop::[WOTC] More Clothes Options (and other stuffs)

Steam Workshop::A Better Weaponry

Star Wars: Rebellion OOC

Steam Workshop::[WoTC] Meaty Abs

You should check out these XCOM 2 mods - XCOM 2 - Giant Bomb