Description
This GBRS Group and Priority 1 collaboration brings together two names known for cutting edge tactical gear to deliver a light-bearing IWB holster built for the way people actually carry duty-size Glocks. Whether it's your daily carry gun or your go-to for professional use, this holster handles modern pistol setups with the kind of thoughtful design you'd expect from builders who spend their time behind the gun.
GBRS Priority 1 Construction and Adjustability
Forged from 0.080-inch Boltaron thermoplastic, this holster hits the balance between durability and a slim profile that won't print under normal clothing. The screw-on retention system lets you dial in exactly how much grip you want on your gun without swapping parts. Cant adjustment gives you options too. You can run it straight or angle it 15 degrees depending on where you're wearing it and your draw style. Ride height is adjustable as well, which matters more than people think if you're mixing and matching belt attachments or trying different carry positions.
Practical Features for X300U-Equipped Glocks
The open-ended muzzle design means you can run threaded barrels without the holster getting in your way. There's a molded optics cut that clears most modern slide-mounted red dots, and the full sweat guard keeps your rear sight off your skin for better comfort during longer carries. The concealment wing rotates your grip inward to tighten your silhouette. A Discreet Carry Concepts monoblock clip secures the holster reliably whether you're wearing a belt or going beltless.
Made in the USA
Each holster gets precision CNC trimming, hand finishing, and is test-fit individually to ensure quality and a proper fit. This is a purpose-built IWB option for serious users who want gear that actually works as well as it looks.
Key Specifications
- Manufacturer: GBRS Group
- Model: GBRS X Priority 1 Holster
- UPC: 850066219348
- Manufacturer Part Number: GEAR-HOLS-IWB-GLK17-19-X300U-R
- Holster Type: Inside-the-Waistband (IWB)
- Hand Orientation: Right Hand
- Material: .080-inch Boltaron (Thermoplastic)
- Firearm Compatibility: Glock 17, 19, 19X with SureFire X300U weapon light
- Retention: Adjustable screw-on retention
- Cant Adjustment: 0 degrees or 15 degrees
- Ride Height: Adjustable
- Belt Clip: Discreet Carry Concepts Monoblock
- Muzzle Design: Open-ended for threaded barrels
- Optics Compatibility: Molded RMR channel and optics cut for slide-mounted optics
- Color: Black
- Made in USA: Yes
What’s Included
- GBRS Group XPriority 1 IWB Holster (right-hand)
Frequently Asked Questions
Will this XPriority 1 holster work with other light brands besides the X300U?
No. This holster is specifically molded for the SureFire X300U-A and X300U-B weapon lights and won't accommodate other brands or light models. If you're running a TLR-7 or different light, GBRS makes separate versions designed for those setups.
Can I adjust the retention on this holster after I get it?
Yes, that's one of the strong points of this design. The screw-on retention system lets you tighten or loosen how much grip the holster has on your gun without any special tools or parts swaps. You can dial it in to your preference pretty easily.
Does the optics cut actually work with most red dots, or are there compatibility issues?
The molded RMR channel and optics cut are designed to clear most popular slide-mounted optics including Trijicon RMRs and other common micro red dots. If you're running something unusual or a particularly large optic, it's worth double-checking dimensions before ordering, but the standard modern red dots fit without issues.
Is this right-hand only, and can I carry it in different positions like appendix?
Yes, this is a right-hand holster only. The adjustable cant and ride height make it flexible enough for different carry positions including appendix, strong side, or 3-4 o'clock carry depending on your belt setup and preference.






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