Glock 20 & X300U OWB Holster

Glock 20 Holster – Fits Surefire X300U-A & X300U-B

Built for big-bore performance and dependable light-bearing carry, this holster is precision-molded for the Glock 20 with a Surefire X300U-A or X300U-B weapon light. Whether you prefer the quick-detach lever system of the A model or the rock-solid screw mount of the B, we’ve got you covered. 

Each holster is made from durable Kydex and designed with full-length light support, secure retention, and optic-ready clearance. The profile is tuned for daily use—on the range, in duty gear, or as part of your backcountry loadout.

Key Features:  

Fits Glock 20 with Surefire X300U-A or X300U-B

Optic cut for red dot compatibility

Adjustable retention for secure, confident carry

Compatible with our OWB mounting options, including QLS

Made in the USA. Molded and tested with the actual firearm and light combo

When you run a powerhouse like the Glock 20, you need gear that can keep up. This holster is ready for anything you throw at it.

Stay Sharp. Stay Ready.

Features:

• Full sweat guard
• Adjustable retention
  
• Made from .093" thick thermoplastic for durability
  
• Open Muzzle for threaded barrels or compensators 
• Minimal material and smooth edges to reduce printing.
  
• The holster is designed to accommodate a red dot sight mounted to the pistol
• Proudly made in the USA.

Our Belt Attachment Blog Article explaining the different options can be found here:

4BROS Four Brothers Holsters Outside Waistband Attachments Explained

Information on the Surefire X300U-B light can be found HERE

Our preferred light option for this holster is the Surefire X300U-B light, which can be purchased from us HERE

*We strongly suggest you apply a removable thread locker to each screw of your holster after you receive it to prevent lost screws while the holster is in use.