Glock 34 with Surefire X300 OWB Holster

Outside Waistband Holster for Glock 34 with Surefire X300U-A/B

This Outside Waistband (OWB) taco-style holster is engineered for the Glock 34 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 X300U installed to function correctly.

Firearm & Generation Compatibility

Select the correct Glock generation for the best fit. This OWB holster accommodates the following pistols, with additional muzzle length extending beyond the holster body on shorter-slide models, provided the X300U-A/B is mounted correctly:

• Glock 19, 17, 45, 47, and 34 (Gen 5)
• Glock 19, 17, 22, 23, and 34 (Gen 3 or Gen 4)

Not compatible with the Glock 23 Gen 5.

Surefire X300U-B Light Information & Purchase

Technical information on the Surefire X300U-B light is available from the official Surefire X300U-B information page .

The recommended light for this holster is the Surefire X300U-B, available for purchase directly from us: Surefire X300U-B Weapon Light – Four Brothers Holsters .

Precision Fit & Construction

Each holster is vacuum-formed using a precision-machined mold created from a CAD model of the actual firearm and light. Every unit is formed, trimmed, and finished in-house to maintain consistency and quality.

Final fit and retention testing is performed with the specific Glock model and Surefire X300U light to ensure a secure hold and predictable draw. Retention level is easily adjustable to match user preference.

Threaded Barrel Support

The holster’s open-muzzle design allows the use of threaded barrels and certain muzzle devices.

Key Features

• Constructed from durable .093" thermoplastic
• Adjustable retention for personalized draw tension
• High sweat guard standard; medium and low height available upon request
• Profile cut to clear most slide-mounted red dot sights
• Minimal material with smoothed, comfortable edges
• Proudly made in the USA

OWB Belt Attachment Guidance

For help selecting the correct OWB attachment option, see our detailed guide: Outside Waistband Belt Attachments Explained .

Magazine Carrier Options

Matching magazine pouches for Glock 9/40 double-stack magazines are available:

• Glock 34 9mm IWB Magazine Pouch
• Glock 34 9mm OWB Magazine Pouch

Color Options

View our available Kydex colors and patterns in the Holster Color Guide .

Maintenance Recommendation

Apply a removable thread locker to all screws after adjustment to prevent hardware loosening during regular carry and training.

FAQs

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

Yes. Retention is based on the X300U light body, so the holster will not function without the light mounted.

Which Glock models fit this holster?

This holster fits Glock 19, 17, 22, 23, 45, 47, and 34 in Gen 3–5 (specific compatibility as listed above). Not compatible with the Glock 23 Gen 5.

Is it compatible with red dot sights?

The holster profile is cut to clear most slide-mounted red dot optics.

Does it support threaded barrels?

Yes. The open-muzzle design supports threaded barrels and certain compensators that extend beyond the slide.

Is retention adjustable?

Yes. Retention screws allow users to fine-tune the holster’s hold strength.

Where can I learn more about OWB belt attachment options?

For a full breakdown of Outside Waistband mounting choices, visit our guide: OWB Belt Attachments Explained .