Glock® 21 Compatible Barrel | Polymer80
About this product
Glock® 21 Compatible Barrel: OEM Performance at a Great Price
Experience reliable cycling and excellent accuracy with this Polymer80 Glock® 21 compatible barrel. Designed to meet factory specifications, this barrel ensures seamless performance with any .45 ACP load, making it a top choice for enthusiasts and professionals alike.
Key Features and Technical Specifications
- Caliber: .45 ACP
- Barrel Length: 4.5 inches
- Twist Rate: 1:16
- Material: High-strength 4150 Gun Steel
- Finish: Durable Black Diamond-Like Carbon (DLC) coating for enhanced wear resistance and corrosion protection
Compatibility Information
This barrel is engineered to fit all generations of Glock® 21 pistols, including Gen 1 through Gen 4 models. Whether you’re building a custom Polymer80 frame or upgrading an existing firearm, this barrel delivers unmatched compatibility and performance.
Installation and Support
For easy installation, refer to our detailed guide on how to assemble your slide. Our commitment to quality and customer support ensures you have the resources needed for a successful build.

Trust in Polymer80’s expertise for all your firearm components. This barrel not only enhances accuracy but also provides long-lasting durability, backed by our reputation in the industry.
Specs at a glance
What's in the box
- Glock® 21 Compatible Barrel | Polymer80