Sig Sauer P365-FUSE IWB Holster

Sig Sauer P365-FUSE IWB Holster

The Sig Sauer P365-FUSE IWB Holster from Four Brothers Inc. is designed for reliable concealed carry with comfort, retention, and minimal printing in mind. Precision-molded specifically for the Sig Sauer P365-FUSE, this Inside Waistband holster provides a secure fit for everyday carry while maintaining a slim, low-profile design.

Each holster is vacuum-formed using a precision-machined mold created from a CAD model of the actual firearm. This ensures consistent retention, reliable performance, and a precise fit for the P365-FUSE platform.

All holsters are formed, trimmed, and assembled in-house. Final fit and function testing are performed using the actual pistol to verify retention, draw consistency, and overall performance.

Designed for Concealed Carry

The holster features adjustable retention so you can fine-tune the draw resistance to match your personal carry preference. The slim profile and smooth edges help reduce printing while maintaining a comfortable concealed carry setup.

The holster profile is cut to accommodate most slide-mounted red dot optics commonly installed on the P365-FUSE platform. The open muzzle design also allows compatibility with threaded barrels or compensators that extend beyond the slide.

Holster Features

• Full sweat guard for comfort and firearm protection
• Adjustable retention for customizable draw tension
• Covered magazine release for added security
• Adjustable ride height and cant for personalized carry positioning
• Compatible with the Phlster Enigma system
• Constructed from durable .093" thermoplastic
• Open muzzle design for threaded barrels or compensators
• Minimal material profile with smooth edges to help reduce printing
• Optics compatible for pistols equipped with red dot sights
• Optional Modwing claw with two inserts to adjust concealment leverage
• Proudly made in the USA

Compatible Accessories and Resources

Learn about the different inside-the-waistband mounting options and carry configurations in our detailed guide:

IWB holster belt and beltless attachment options explained

We have a kit available should you need to remove the modwing that includes  (2) 3/8" Screws, (2) 1/4" Rubber Spacers, and (2) 1/4" Threaded Posts which can be purchased HERE.

Browse our full selection of holsters designed for the P365-FUSE platform:

Sig Sauer P365-FUSE holster collection

Complete your carry setup with a dedicated magazine carrier:

P365-FUSE IWB magazine carrier

P365-FUSE OWB magazine carrier

Explore available Kydex color and pattern options before selecting your holster finish:

Holster color guide

Frequently Asked Questions

Is this holster designed specifically for the Sig Sauer P365-FUSE?

Yes. This holster is precision-molded specifically for the Sig Sauer P365-FUSE using a CAD-based mold of the firearm to ensure proper retention and consistent fit.

Is the holster compatible with red dot optics?

Yes. The holster profile is cut to accommodate most slide-mounted red dot optics commonly used on the P365-FUSE platform.

Can the retention be adjusted?

Yes. The retention screw allows you to easily adjust the draw tension to your preferred level.

Is this holster compatible with the Phlster Enigma?

Yes. This holster is compatible with the Phlster Enigma system, allowing for beltless concealed carry configurations.

Will the holster work with threaded barrels?

Yes. The open muzzle design allows compatibility with threaded barrels or compensators that extend past the slide.

Should I apply thread locker to the screws?

We recommend applying removable thread locker to the screws after receiving your holster to help prevent screws from loosening during regular use.

• Full Sweat Guard
• Adjustable Retention
• Adjustable Cant
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Made from .093" thermoplastic for durability.
• Optional Modwing includes 2 inserts to allow the user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
• Proudly Made in the USA

• Monoblock
• 1 Series Gear Clips
• Ultituck
• Soft Loops 
• RCS Overhooks
• Ulticlip

IWB Belt Attachments Explained

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

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