SilencerCo Barrel Glock 21 45acp .578x28

The SilencerCo Barrel Glock 21 45acp .578x28 is a precision-threaded barrel assembly engineered for shooters who demand suppressor-ready capability on the full-size Glock 21 platform. Built for law enforcement, military personnel, and civilian operators seeking to integrate sound suppression into their duty or defensive setup, this barrel replaces the factory component and provides the critical interface between your firearm and a compatible suppressor.

The .578x28 thread pitch is the industry standard for .45 ACP suppressors, making this barrel your gateway to hearing-safe shooting without sacrificing ergonomics or reliability. Manufactured by SilencerCo, a leader in suppressor and precision firearm components, this barrel features full-length threading for optimal suppressor mounting consistency. The 5.2-inch design maintains the Glock 21's proven balance and handling characteristics while the .578x28 thread specification ensures compatibility with modern commercial .45 ACP suppressors.

SilencerCo's precision machining yields tight tolerances that support both accuracy and suppressor indexing, critical factors for sustained suppressed fire in tactical and duty applications. The barrel's weight and compact profile integrate seamlessly with the Glock 21's slide geometry, preserving the platform's inherent reliability and round-count endurance. Installation is straightforward for armorer-level technicians or gunsmiths; the barrel drops into the slide and frame assembly.