4BROS Rost Martin DadBod Appendix Rig

4BROS Rost Martin DadBod Appendix Rig – IWB Sidecar Holster for Rost Martin Pistols

Purpose-built for comfort and concealment. The 4BROS Rost Martin DadBod Appendix Rig is an IWB (Inside Waistband) sidecar holster system engineered to provide enhanced comfort for larger body types—while remaining fully adjustable for slimmer builds. Designed specifically for Rost Martin pistols, this appendix carry setup delivers improved spacing, better concealment geometry, and dependable retention.

Unlike traditional sidecar holsters that can feel restrictive, the DadBod Appendix Rig features adjustable spacing between the holster and magazine carrier, allowing you to fine-tune fit based on body type and carry preference.

Optimized for Appendix Carry Comfort

At the core of the system is our Tegris Appendix Adapter Plate, featuring a relief “D-cut” that increases flexibility and reduces pressure points when seated or bending. The added articulation creates a more natural contour against the body, helping minimize printing while improving long-term wear comfort.

• Built for Bigger Builds – Increased spacing reduces discomfort at the stomach and hip.
• Adjustable Width – Customize the gap between holster and mag carrier for your ideal fit.
• Tegris Adapter Plate – Lightweight, durable, and engineered for flexibility.
• Adjustable Cant & Ride Height – Dial in the draw angle and carry height for both the holster and the magazine carrier.
• Retention on the Light (Light-Bearing Models) – Secure lockup on compatible weapon-mounted lights for consistent retention and draw.

Precision Fitment for Rost Martin Pistols

Pistol Fitment: Each holster is custom-formed to the exact Rost Martin pistol or pistol/light combination selected from the dropdown menu.

Magazine Carrier: Designed to match your selected firearm model. Magazine retention is adjustable via the side-mounted set screw, allowing precise tension adjustment.

Made in the USA

Proudly manufactured in Logansport, Indiana, using premium materials and precision forming processes.

Pro Tip: Apply a removable thread locker to all hardware screws after final adjustment to prevent loosening over time.

Supported Rost Martin Pistols

The 4BROS Rost Martin DadBod Appendix Rig is available for select Rost Martin concealed carry pistols. Each holster is precision-molded to the exact firearm or firearm and weapon light combination selected from the dropdown menu to ensure proper fit and retention.

• Rost Martin RM1C
• Rost Martin RM1F

Complete Your Carry Setup

Frequently Asked Questions

What is the 4BROS Rost Martin DadBod Appendix Rig?

It is an IWB (Inside Waistband) sidecar-style appendix holster designed for Rost Martin pistols, featuring adjustable spacing between the holster and magazine carrier to improve comfort and concealment.

Who is this appendix holster designed for?

This rig was engineered for larger body types who experience discomfort with traditional appendix rigs. However, the adjustable width system allows it to work equally well for slimmer builds.

What pistols and lights does this holster support?

Each holster is custom-built to the exact Rost Martin pistol and optional weapon-mounted light selected from the dropdown menu. Only listed configurations are supported to ensure proper retention and fit.

How does retention work?

For light-bearing models, retention is indexed on the weapon-mounted light. For non-light-bearing models, retention is applied directly to the pistol. Magazine retention is adjustable via a side tension screw.

Is the holster adjustable?

Yes. Both the holster and magazine carrier offer adjustable cant and ride height. The spacing between components is also customizable for improved comfort and concealment.

What if my Rost Martin model or light is not listed?

If your configuration is not shown, contact our holster support team. We may already support your setup or be able to evaluate it for production.

Please review our Four Brothers Holsters Exchange, Return and Refund Policy

Made in America. Founded, located, engineered, manufactured, and shipped from Northern Indiana.