Modular Rocket Systems (MRS) by Orvidius

Modular Rocket Systems (MRS)

Modular Rocket Systems (MRS)
KSP version License
Curseforge GitHub GitHub Pages

A stock-alike parts pack with 67 parts that fills in a variety of gaps in the stock lineup of rocketry parts.

By zer0Kerbal, originally by NecroBones

adopted with express permission and brought to you by KerbSimpleCo

ModularRocketSystems Hero

Preamble by NecroBones

Modular Rocket Systems is a parts pack for KSP, with the following design goals:

  • Fill in some of the gaps in the selection of stock parts. For example, size-3 and size-0 SAS modules, and size-3 monopropellant tanks.
  • Preserve the stock balance. All parts have their costs, masses, and capacities chosen based on stock analogs.
  • Provide some additional cosmetic choices. Examples include the 2.5m fuel tanks, and various nose cones. They have direct analogs in the stock line-up, and share the same stats, but give you additional aesthetic options.
  • Maintain a stock-like appearance and seamlessly fit into the game, while following its own artistic style. This one is trickier, but by taking cues from the stock-parts, it's possible to make something new, that also fits with the game's existing aesthetic.
  • Be friendly to your CPU/GPU. Very importantly, these parts follow most of the stock-part rules for how polygons are used, and collision meshes are configured. They shouldn't reduce your framerate any more than the stock parts do.

All of the models and textures were made 100% from scratch, using Blender, Photoshop, and Unity. The only exception is the "mini orange tank" which borrowed a scaled-down sample of the orange pattern from the stock Jumbo Orange tank.

Modular Rocket Systems is also the in-game manufacturer of these parts, and they will appear as an agency that can provide contracts for career mode (assuming I've set it up right - untested), and have a flag available for use as well.

(Note that the stats, appearances, and descriptions of the parts shown below are subject to change, or may be out of date)

See more

Youtube logo

Modular Rocket System - 2 Minute Mods - Kerbal Space Program 03

Kerbal Space Program Mod Spotlight || Modular Rocket Systems


  • English English
  • Russian (Русский) Russian (Русский) - спасибо evanisrael
  • your translation here

Help Wanted

  • Compatibility patches
  • Contracts for these glorious parts
  • Updated sample crafts/subassemblies
  • Variant Textures and model updates (add/improve lights, iva, hatches and so forth)
  • Marketing Images and Videos such as hero shots, animated gifs, short highlights
  • Translations: See the README's in the Localization folder for instructions for adding or improving translations. There is also the quick start guide(s)GitHub push is the best way to contribute. Additions and corrections welcome!
  • Have a request? Glad to have them, kindly submit through GitHub.

Installation Directions

Most recent releases only available via CurseForge/OverWolf Website/App

CurseForge/OverWolf App






parts, config, flags, agency, textures, variants, control, graphics, sound, resources, science, tech-tree, career, crewed, uncrewed

red box below is a link to forum post on how to get support

How to get support

Be Kind: Lithobrake, not jakebrake! Keep your Module Manager up to date

Credits and Special Thanks

Legal Mumbo Jumbo (License provenance)

Author (1) - zer0Kerbal

Forum: Thread - Source: GitHub - Download: CurseForge
License: License License

Original Author (ROOT) (0): NecroBones

Forum: Thread - Download: CurseForge - Source: CurseForge
License: License License


  • All bundled mods are distributed under their own licenses

  • All assets, including but not limited to: animations, models, sounds and textures are distributed under their own licenses. License

  • see Notices for more legal Mumbo Jumbo

How to support this and other great mods by zer0Kerbal

Comment, click, like, share, up-vote, subscribe

Completely voluntary, absolutely amazing, and really does help me out a lot!
and it is true.

Support Patreon

Connect with me

Track progress: issues here and projects here along with The Short List

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