Glock 43X & 48 MOS with XC3 Sub IWB Holster

Glock 43X MOS, 48 MOS, 43X & 48 and SureFire XC3 Sub IWB Inside Waistband Holster

Designed for concealed carry, this light-bearing IWB holster is precision molded for the Glock 43X MOS, Glock 48 MOS, Glock 43X, and Glock 48 equipped with the SureFire XC3 Sub weapon light. Built from durable .093" Kydex, the optics-ready design offers adjustable retention, ride height, and cant, with a slim profile that helps minimize printing while providing a smooth, consistent draw for everyday carry.

Important: Retention is engineered around the mounted weapon light—not the firearm. The SureFire XC3 Sub must remain attached to the handgun for the holster to retain the firearm correctly.

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.

Compatible Firearms

• Glock 43X MOS
• Glock 48 MOS
• Glock 43X
• Glock 48

Compatible Weapon Lights

• SureFire XC3 Sub

Precision Fit & Performance

Every Four Brothers Holster is vacuum formed using a precision-machined mold developed from CAD models of the actual firearm and weapon light. Each holster is formed, trimmed, folded, and assembled in-house before being individually tested with the actual Glock and SureFire XC3 Sub combination to verify proper fit, retention, and reliable performance.

The adjustable retention system allows you to fine-tune the draw to your preference, while adjustable ride height and cant let you customize the holster for appendix carry or other preferred concealed carry positions.

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
  
• Available in right- and left-handed configurations
• Precision formed from durable .093" Kydex thermoplastic
• Proudly made in the USA

Helpful Resources

See product information for the SureFire XC3 Sub here.

Learn about the available belt clips and carry options in our Inside Waistband Belt Attachment Guide.

See all available Kydex colors and patterns in our Holster Color Guide.

Prefer to carry without the ModWing? Our replacement hardware kit includes the screws, rubber spacers, and threaded posts needed to configure the holster without it. 

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:
Glock 43X & 48 IWB Magazine Carrier
Glock 43X & 48 OWB Magazine Carrier
Shield Arms S15 Magazine Carriers

Browse our Glock 43X & 48 with SureFire XC3 Sub Products:
Glock 43X & 48 SureFire XC3 Sub OWB Holster
Glock 43X & 48 SureFire XC3 Sub Duty & Competition Holster
Glock 43X & 48 SureFire XC3 Combo Kit

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.

Which Glock models fit this holster?

This holster is designed for the Glock 43X MOS, Glock 48 MOS, Glock 43X, and Glock 48 equipped with the SureFire XC3 Sub.

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 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.

Note: We recommend applying removable thread locker to all holster screws after receiving your holster to help prevent hardware from loosening during normal use.

• 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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