Currently focusing on weapons, as armour is still a bit beyond me. Warhammer 40k Weapons Released 2015 Roguelike This has gone from learning to make weapons into a full Warhammer mod. If you're using the base Rimhammer - The End Times mod, you should load that immediately after the previously mentioned two mods, and before this one. This mod requires Jec's Tools, Jec's Doors Expanded, and Humanoid Alien Races 2.0 mods to be loaded before it.
The best one is Rimhammer 40k but it is outdated ( sadly ) the second one is Astra Militarum Imperial Guard ( pretty cool) but it is a little bit op as soon as you finish all the research,I recommend you to pair it with Adeptus Mechanicus: Armoury that add a ton of weapon and also allow your Terminator to deepstrike into your enemies.
If you googled this thinking you can be clever and get the non-steam download and are now suffering a massive list of errors, don't expect help.
See discussions for full feature list and compatibility. Warhammer 40K introduced to Rimworld in a vanilla style.