Sig Sauer P365-FUSE & XC3 Sub OWB Holster

Sig Sauer P365-FUSE and SureFire XC3 Sub OWB Outside Waistband Holster

This OWB (Outside Waistband) Holster is designed specifically for Sig Sauer P365-FUSE pistols equipped with the SureFire XC3 Sub weapon light. Precision-built from durable .093" Kydex thermoplastic, this light-bearing holster delivers secure retention, consistent draw performance, and a clean, reliable setup for everyday OWB carry, range training, and open carry.

Please note: Our 4BROS Belt Slides are designed to work with standard belts for everyday carry, not thicker "Battle Belt" style belts with rows of MOLLE on the outside.

Compatible Firearm

• Sig Sauer P365-FUSE

Light-Bearing Retention

This holster uses a light-based retention system, locking securely onto the attached weapon light rather than the firearm frame. The SureFire XC3 Sub must be installed for proper holster fit and retention.

Compatible Weapon Light:

• SureFire XC3 Sub

Light Installation: This holster is designed and tested with the SureFire XC3 Sub installed using the (A) Rail Set with the #1 Key. This mounting hardware is included with the XC3 Sub by SureFire.

Retention is adjustable, allowing you to fine-tune the fit and draw to your preference.

See product information for the SureFire XC3 Sub.

Belt Attachment Options

Choose our 4BROS-designed Belt Slides for a secure, streamlined OWB setup, or select from other trusted attachment options like the Blade-Tech Tek-Lok and Safariland QLS Fork to configure your holster for your preferred setup.

Learn more about our OWB belt attachment options to find the configuration that works best for you.

Precision Fit & Construction

• Vacuum-formed using precision molds developed from CAD models of the firearm and weapon light.
• Every 4Bros holster is trimmed, folded, assembled, and finished in-house.
• Retention and fit are tested using the actual firearm and weapon-light combination.
• Constructed from durable .093" Kydex thermoplastic for consistent fit and retention.

Features

• Full sweat guard for increased comfort and firearm protection
• Adjustable retention
• Low-profile design with smooth edges for comfortable all-day carry
• Profile cut to clear most popular red dot sights
• Open-ended design accommodates threaded barrels and many compensator setups
• Precision formed from durable .093" Kydex thermoplastic
• Available in right- and left- handed configurations
• Personalize your setup with a holster color or pattern that fits your style.
• Proudly made in the USA

Complete Your Carry Setup

Pair your holster with a compatible Sig Sauer P365-FUSE magazine carrier for a complete everyday carry or range setup.

• P365-FUSE IWB magazine carrier
• P365-FUSE OWB magazine carrier
  

See more Sig Sauer P365-FUSE & SureFire XC3 Sub Holsters:

Sig Sauer P365-FUSE & XC3 Sub IWB Holster
Sig Sauer P365-FUSE & XC3 Sub Duty & Competition Holster

Care & Maintenance

For long-term reliability, apply a removable thread locker to all hardware after initial setup to help prevent loosening during regular use.

See our Apply Thread Locker to Your Holster video for a quick application guide.

If you choose the optional ModWing and later want to remove it, you'll need our Replacement Hardware kit, which includes (2) 3/8" screws, (2) 1/4" rubber spacers, and (2) 1/4" threaded posts.

Frequently Asked Questions

Will this holster work without the SureFire XC3 Sub installed?

No. This holster retains the weapon light rather than the firearm. The SureFire XC3 Sub must remain mounted to the pistol for proper retention.

How should the SureFire XC3 Sub be installed for proper holster fit?

This holster is designed and tested with the SureFire XC3 Sub installed using the (A) Rail Set with the #1 Key provided by SureFire.

Which Sig Sauer P365 pistol fits this holster?

This holster is designed for the Sig Sauer P365-FUSE pistol equipped with the SureFire XC3 Sub weapon light.

Is this holster optics compatible?

Yes. The holster profile is cut to clear most popular red dot sights.

Can I use a threaded barrel or compensator?

Yes. The open muzzle design allows clearance for threaded barrels and many compensator setups.

Can I adjust the retention?

Yes. Adjustable retention allows you to customize the draw resistance for your preferred carry setup.

Is this holster available for left-handed shooters?

Yes. This holster is available in both right- and left-handed configurations. Select your preferred configuration when ordering.

What type of belt works with this OWB holster?

Belt compatibility depends on the selected attachment. Our 4BROS Belt Slides are designed for standard everyday carry belts and are not intended for thicker MOLLE-style battle belts.  See our OWB Belt Attachment Guide for additional attachment information.

Where is this holster made?

Every Four Brothers Holster is proudly manufactured in the USA from premium .093" Kydex and individually inspected to ensure proper fit and function.

• Full Sweat Guard
• Adjustable Retention
• Profile cut to allow red dot sights
• Minimal material and smooth edges
• Proudly Made in the USA

• 4BROS Belt Slide
• Tek-Lok
• Sting Ray Belt Slide
• QLS Fork
• No Belt Attachment

OWB Belt Attachments Explained

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

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