Sig Sauer P365-XMACRO & XC3 Sub IWB Holster

Sig Sauer P365-XMACRO & SureFire XC3 Sub IWB Inside Waistband Holster

This IWB (Inside Waistband) Holster is designed specifically for the Sig Sauer P365-XMACRO 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 streamlined profile for comfortable, everyday concealed carry.

Compatible Firearms

• SIG SAUER P365-XMACRO
• SIG SAUER P365-XMACRO COMP
• SIG SAUER P365-XMACRO TACOPS
• SIG SAUER P365-XMACRO ROMEOZero Elite
• Compatible with manual-safety models

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

We offer a selection of proven, reliable IWB belt attachment options to fit different carry preferences, including popular choices like the Discreet Carry Concepts Monoblock and UltiClip UltiTuck.

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

Precision Fit & Construction

• Vacuum-formed using precision molds developed from CAD models of the firearm and weapon light.
• Each 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
• Adjustable ride height and cant
• Slim profile with smooth edges to help reduce printing
• Optional ModWing with two interchangeable inserts helps rotate the grip toward the body to reduce printing and improve concealment.
• Profile cut to clear most popular red dot sights
• Precision formed from durable .093" Kydex thermoplastic
• Available in right- and left-handed configurations
• Personalize your setup with a holster colors or pattern that fits your style.
• Proudly made in the USA.

Complete Your Carry Setup

Complete your concealed carry setup with purpose-built accessories designed for comfort, concealment, and everyday use.

4Bros Holster Wedge— Designed to improve concealment and comfort by helping angle the firearm grip closer to the body while reducing pressure points during IWB carry.

Compatible Magazine Carriers:

• P365-XMACRO IWB magazine carrier
• P365-XMACRO OWB magazine carrier

Shop our outside the waistband holsters for the Sig Sauer P365-XMACRO with SureFire XC3 Sub:

Sig Sauer P365-XMACRO & XC3 Sub OWB Holster
Sig Sauer P365-XMACRO & 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 ourReplacement 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, not the firearm. The SureFire XC3 Sub must remain mounted to the pistol for proper retention.

Does this holster fit the P365-XMACRO COMP or TACOPS?

Yes. It is compatible with the P365-XMACRO, XMACRO COMP, TACOPS, and ROMEOZERO ELITE when equipped with the SureFire XC3 Sub.

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.

Is this holster optics compatible?

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

What does the optional ModWing do?

The optional ModWing helps rotate the grip of the firearm towards the body to reduce printing and improve concealment. Two interchangeable inserts are included, allowing you to adjust the amount of concealment leverage.

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.

Where can I learn more about my holster attachment and color options?

• Learn more about our IWB belt attachment options to find the carry configuration that works best for you.
• -Explore our holster colors & patterns.

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
• Adjustable Cant
• Profile cut to allow red dot sights
• Minimal material and smooth edges
• Made from .093" thick 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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