Outside Waistband Duty & Competition Style Holster designed to fit the Glock 34, 17, 19, and 47 with the Surefire X300U-A or X300U-B weapon-mounted light.  The holster retention is on the light itself and not the pistol, which means this holster will not work without the light mounted on the firearm. This holster works best with a Gen 5 Glock 19, 17, or 34 handgun. The holster retention must be adjusted for a Gen 3 or 4 pistol. This holster is compatible with the Gen 3 & 4 Glock 23, it does not work with the Gen 5 Glock 23. Product Details: Our holsters are vacuum-formed with a precision machined mold designed from a CAD model of the actual firearm and light. Each holster is formed, trimmed, and folded in-house. Final fit and function tests are done with the actual pistol and light to ensure the holster fits the gun/light combination and has the correct amount of retention. The holster's retention is easily adjusted so that the fit can be set to your personal preference.  The holster is also built to accommodate threaded barrels. Features: Made from .080" Thermoplastic for durability  Adjustable retention High sweat guard standard, medium and low height available on request.  Holster profile cut to allow red dot sights on the pistol Minimal material and smooth edges Proudly made in the USA See all our Duty and Competition Holsters here: Four Brothers Holsters Duty and Competition Collection Our Belt Attachment Blog Article explaining the different duty & competition options can be found here: Be Ready When the Competition Starts Magazine Pouches for these models can be found here: Glock 9mm IWB Magazine Pouch Glock 9mm OWB Magazine Pouch *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.