Spiritus Systems Fat Strap MK4 in MultiCam featuring an H-harness design, integrated mounting panels, and compatibility with Micro Fight and 34 Alpha chest rig systems.
Spiritus Systems Fat Strap MK4 in Black designed to provide comfortable weight distribution and modular attachment points for chest rig systems.
Spiritus Systems Fat Strap MK4 in Ranger Green featuring a low-profile H-harness design for modular chest rig configurations.
Spiritus Systems Fat Strap MK4 in Coyote Brown built for comfort, stability, and integration with Spiritus Systems chest rig platforms.
Spiritus Systems Fat Strap MK4 in Desert Tiger Stripe featuring a lightweight H-harness design, integrated mounting panels, and compatibility with Micro Fight, Thing 2, and 34 Alpha chest rig systems.
Spiritus Systems Fat Strap MK4 in MultiCam Arid designed to distribute load evenly while supporting communications and mission-essential accessories.
Spiritus Systems Fat Strap MK4 in MultiCam Black featuring an H-harness layout and integrated mounting fields for tactical chest rig setups.
Spiritus Systems Fat Strap MK4 in MultiCam Tropic providing lightweight support and modular integration for chest rig systems.
Spiritus Systems Fat Strap MK4 in OV Tiger Stripe featuring a low-profile H-harness design, integrated accessory mounting fields, and compatibility with Spiritus Systems modular chest rig platforms.
Close-up of the Spiritus Systems Fat Strap MK4 showing the Squadron laminate mounting surface used for cable routing, PTTs, and mission-essential accessories.
Close-up of the Spiritus Systems Fat Strap MK4 showing the side-release clasp hardware, attachment points, and mounting slots used to connect the harness to compatible chest rig systems.
Spiritus Systems Fat Strap MK4 mounted to a chest rig chassis, demonstrating complete harness integration and load-bearing support for modular tactical setups.

Spiritus Systems Fat Strap Mk4

By Spiritus Systems
$ 49.95
Color:

Spiritus Systems Fat Strap MK4 | Tactical Chest Rig H-Harness

Built for Comfort, Modularity, and Chest Rig Integration

The Spiritus Systems Fat Strap MK4 is a low-profile H-harness designed to provide comfort, stability, and modular capability for chest rig systems. Built to integrate seamlessly with the Micro Fight Chassis, 34 Alpha Split Chest Rig, and Thing 2 expansion system, it delivers a streamlined solution without unnecessary bulk.

If you are searching for a chest rig harness, Spiritus Systems Fat Strap, H-harness for chest rigs, or modular chest rig straps, this is a core component for building out a complete loadout.

Streamlined H-Harness Design

The MK4 uses a classic H-harness layout to evenly distribute weight across your shoulders, improving comfort during extended wear while maintaining a stable fit.

Expanded Real Estate for Gear Mounting

A Squadron laminate overlay panel adds horizontal mounting space for PTTs, comms gear, cable routing, and shock cord attachments, giving you more functionality without adding bulk.

Built for Modular Systems

Designed to work seamlessly with Spiritus Systems platforms including Micro Fight, 34 Alpha, and Thing 2, making it a versatile upgrade across multiple setups.

Rear Loop Field for Identification

A loop panel on the back allows for name tapes, IR markers, or identification patches, adding utility without overcomplicating the design.

Minimalist, No-Nonsense Construction

Built with Spiritus Systems’ “Brilliance in the Basics” approach, the Fat Strap MK4 avoids unnecessary features and focuses on durability, comfort, and real-world performance.


Why We Love the Spiritus Systems Fat Strap MK4:

Comfortable, modular, and built to support your rig without adding weight or complexity.


Key Features of the Spiritus Systems Fat Strap MK4:

  • H-harness design for improved weight distribution and comfort
  • Compatible with Micro Fight, 34 Alpha, and Thing 2 systems
  • Squadron laminate overlay for added mounting space
  • Supports PTTs, comms gear, and cable management
  • Rear loop field for name tape or IR marker placement
  • Lightweight, low-profile construction
  • Designed for modular chest rig setups
  • Made in the USA

Compatibility

  • Spiritus Systems Micro Fight Chassis
  • Spiritus Systems 34 Alpha Chest Rig
  • Spiritus Systems Thing 2 Expansion System

Important Notes

  • Includes one complete harness (not sold as a pair)
  • Does not include chassis, back strap, or accessories
  • Additional gear shown may be sold separately
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