The SilencerCo AC863 threaded barrel is designed for Glock 21 pistols and provides a reliable platform for use with a compatible pistol suppressor. Built for shooters who demand dependable performance, this replacement barrel is made from durable 416R stainless steel and finished with black nitride for enhanced corrosion resistance and a hard-wearing surface. Its .578x28 thread pattern is designed to accept compatible suppressor mounting components.
For use with a pistol suppressor, the SilencerCo AC863 requires a compatible piston, which is sold separately. The barrel includes a thread protector to help shield the external threads when a suppressor is not installed. As part of SilencerCo’s E X Tra barrel line, this model combines practical functionality with the quality-focused construction expected from the brand.
The AC863 features a 5.30-inch barrel length, a threaded barrel profile, and no integrated sights, making it suitable for Glock 21 configurations that use the pistol’s existing sighting setup or aftermarket sights. The black nitride finish helps protect the 416R stainless-steel barrel from wear while maintaining a clean, professional appearance. Verify firearm compatibility, thread specifications, and applicable local regulations before installation or use.
Features:
- 416R stainless steel construction
- Black nitride finish for durability and corrosion resistance
- Compatible with Glock 21 pistols
- .578x28 muzzle threads
- 5.30-inch barrel length
- Threaded barrel design for compatible suppressor use
- Includes thread protector
- Requires a compatible suppressor piston, sold separately
- No integrated sights
- SilencerCo E X Tra barrel
