Brownells Pistol Barrel For Glock 20,9/16''-24 Thread,Black Nitride

The Brownells Pistol Barrel for Glock 20 with 9/16"-24 threads is a match-grade replacement tube built for shooters who demand accuracy and reliability from their G20. Whether you're swapping out a worn factory barrel, building a custom pistol on a Polymer80 frame, or assembling a gun around a Brownells slide, this barrel delivers the precision fit and performance you need. It's compatible with all generations of the Glock 20 and functions as a true drop-in—no gunsmithing required on most builds.

Machined from 416R stainless steel to exacting tolerances, this barrel features a tight lockup that supports consistent accuracy shot after shot. The button-rifled bore sports a standard 1-10" right-hand twist with 6 grooves, making it suitable for both jacketed and non-jacketed practice ammunition. The threaded muzzle (9/16"-24 TPI) lets you mount a compensator or suppressor, giving you flexibility for your specific shooting setup.

Durability is built in: the Black Nitride finish is hard-anodized to resist wear and corrosion, protecting the stainless steel underneath without adding bulk or weight. This is a barrel designed to handle years of shooting and cleaning without showing its age. Each barrel arrives laser-engraved with its chambering and Glock model designation, so there's no guessing what you've got.

Key Features

• Match-grade precision from 416R stainless steel
• Drop-in fit for Glock 20 (all generations)
• Threaded 9/16"-24 TPI muzzle for suppressors and compensators
• Button-rifled 1-10" twist, 6-groove rifling
• Compatible with jacketed and non-jacketed ammunition
• Black Nitride anti-corrosion finish resists wear and oxidation
• Tight lockup for consistent accuracy
• Laser-engraved chambering and model designation

Specifications

Frequently Asked Questions

Will this barrel work with my Glock 20 build on a Polymer80 frame?

Yes. This barrel is designed as a drop-in fit for Glock 20 platforms, including custom builds using Polymer80 frames paired with a Brownells slide.

What does the 9/16"-24 thread mean, and what can I attach?

The 9/16"-24 TPI threads on the muzzle allow you to install a suppressor or compensator. These threads follow the standard specification for 10mm pistol suppressors and muzzle devices designed for this thread pattern.

Can I use this barrel with reloaded or lead ammunition?

Yes. The button-rifled bore is compatible with both jacketed and non-jacketed (lead) practice ammunition, giving you flexibility in what you shoot downrange.

How does this compare to the factory Glock 20 barrel?

This is a match-grade replacement machined to tighter tolerances than factory specs. The improved lockup supports better accuracy, and the Black Nitride finish provides enhanced durability against corrosion and wear compared to the standard factory finish.