Glock 34 with Surefire X300 Duty & Competition Holster

Description

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

This Outside Waistband (OWB) duty and competition 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 will not function correctly without the light installed.

Firearm & Generation Compatibility

Select the appropriate Glock generation for the best fit. The holster is designed to fit the following pistols, with additional muzzle length remaining when used on shorter slide models, as long as the Surefire 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-A/B Light Information & Purchase

Specifications for the Surefire X300U-B weapon light can be found at the official Surefire X300U-B information page .

The recommended light for this holster, the Surefire X300U-B, is available directly from us at 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. Holsters are formed, trimmed, and assembled in-house. Every unit undergoes final fit and retention testing using the specific pistol and Surefire X300U light to ensure consistency and reliability.

Retention is fully adjustable, allowing users to fine-tune draw resistance for duty, training, or competition use.

Threaded Barrel Compatibility

This holster accommodates threaded barrels without compromising fit or function.

Key Features

Constructed from durable .093" thermoplastic
Adjustable retention system
High sweat guard standard; medium and low options available upon request
Red dot sight–compatible holster profile
Minimal material with smoothed, comfort-focused edges
Proudly made in the USA

Duty & Competition Resources

Explore all duty and competition holster options in our collection: Duty & Competition Holster Collection .

For guidance on selecting duty and competition belt attachments, review our article: Duty & Competition Attachment Guide .

Magazine Carrier Options

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

Color Options

For help choosing your holster color or pattern, visit our Holster Color Guide .

Maintenance Recommendation

We recommend applying a removable thread locker to all screws once the fit is adjusted. This helps prevent screw movement during daily carry or rigorous training.

FAQs

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

Yes. Retention is based on the X300U-A/B light body, so the holster will not function without the light attached.

Which Glock models does this holster fit?

This holster fits Glock 19, 17, 22, 23, 45, 47, and 34 (Gen 3–5 depending on model). It is not compatible with the Glock 23 Gen 5.

Is this holster red dot compatible?

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

Will it support threaded barrels?

Yes. The holster is designed to accommodate threaded barrels used on duty and competition setups.

Can I adjust the retention?

Yes. Retention screws allow you to set the holster’s hold strength to your preference.

Where can I learn about duty & competition belt attachments?

See our Duty & Competition Attachment Guide for belt comparisons, recommendations, and mounting guidance.

Features

• Outside Waistband Holster specifically designed for USPSA, 3-Gun, Steel Challenge, and other competition shooting sports (May not be IDPA Legal)
• Comes Standard with Blade-Tech Drop and Offset belt attachment
• Holster Retention is easily adjustable
• Molded with .093" thick thermoplastic for durability
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Proudly Made in the USA