Glock 19/45 with Surefire X300 OWB Holster

Description

Outside Waistband Holster for Glock 19 and 45 with Surefire X300U-A or X300U-B

This Outside Waistband (OWB) taco-style holster is purpose-built for the Glock 19 and Glock 45 equipped with the Surefire X300U-A or X300U-B weapon-mounted light. Retention is secured on the light body—not the pistol—so the holster must be used with the light mounted on the firearm.

Firearm & Generation Compatibility

Select the correct Glock generation for optimal fit: Glock 19 Gen 5, Glock 45 Gen 5, or Glock 19 Gen 3/4. This holster is also compatible with the Glock 23 Gen 3 & 4, but not compatible with the Glock 23 Gen 5.

Surefire X300U-B Light Information & Purchase

For technical details on the Surefire X300U-B weapon light, visit the official Surefire X300U-B information page .

Our preferred light for this holster is the Surefire X300U-B, available directly from us at Surefire X300U-B Weapon Light – Four Brothers Holsters .

Precision Fit & Build Quality

Our OWB holsters are vacuum-formed using a precision-machined mold designed from a CAD model of the actual firearm and light. Each holster is formed, trimmed, and finished in-house. Final fit and function tests are done using the specific Glock and Surefire X300U combination to confirm secure retention and a consistent draw.

Retention is easily adjustable via the hardware so you can set the draw tension to your personal preference.

Threaded Barrel & Compensator Compatibility

The holster accommodates threaded barrels and compensators that are no larger than the slide in height and width. Compensators extending beyond the slide will protrude from the open muzzle end of the holster.

Key Features

Constructed from durable .093" thermoplastic Kydex for long-term use
Adjustable retention for personalized draw feel
High sweat guard standard; medium and low sweat guard options available by request
Holster profile cut to allow clearance for most red dot sights on the pistol
Minimal material and smooth edges for comfort and fast presentation
Proudly made in the USA

OWB Belt Attachment Guidance

For help selecting the best Outside Waistband belt attachment style for your carry needs, review our detailed guide: Four Brothers Holsters OWB Belt Attachments Explained .

Magazine Carrier Options

Matching magazine pouches for Glock 9/40 double-stack magazines are available in both IWB and OWB configurations:

Color Options

Unsure which Kydex color or pattern to choose for your OWB holster? See our Holster Color Guide for side-by-side examples and recommendations.

Maintenance Recommendation

We strongly suggest applying a removable thread locker to each screw after adjusting the holster to your liking. This helps prevent screws from backing out during regular carry and range use.

FAQs

Does this OWB holster require the Surefire X300U-A or X300U-B?

Yes. Retention is based on the Surefire X300U-A or X300U-B light body. The holster will not function properly without the light mounted to the pistol.

Which Glock models does this holster fit?

This holster fits Glock 19 Gen 3/4, Glock 19 Gen 5, Glock 45 Gen 5, and Glock 23 Gen 3/4 with the Surefire X300U-A or X300U-B attached. It is not compatible with the Glock 23 Gen 5.

Is this holster compatible with red dot sights?

Yes. The holster profile is cut to clear most common red dot sights mounted on the pistol slide.

Will threaded barrels and compensators work with this holster?

Yes, as long as the threaded barrel or compensator does not exceed the slide’s height and width. Compensators may extend slightly from the open muzzle end of the holster.

Can I adjust the retention on this OWB holster?

Yes. Retention screws allow you to fine-tune how tightly the holster holds the firearm and light combination.

What belt attachments do you recommend for OWB carry?

The best belt attachment depends on your use case and belt style. For detailed comparisons and examples, visit our OWB Belt Attachments Explained guide .

Features

• Full Sweat Guard
• Adjustable Retention
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Proudly Made in the USA