SilencerCo AC863 Threaded Barrel | Glock 21 | .45 ACP

The SilencerCo AC863 is a threaded replacement barrel designed for use with Glock 21 pistols. It is constructed from 416R stainless steel and finished in black nitride, with a .578×28 right-hand thread pattern for attaching muzzle devices or pistons. This barrel is intended for use with a pistol suppressor and includes a thread protector for transport and storage.

Product Specifications

• The caliber is .45 ACP.
• The barrel is made from 416R stainless steel.
• The finish is black nitride.
• The thread pattern is .578×28 (right-hand).
• The barrel features are threaded for suppressor or muzzle device attachment.
• The product includes a thread protector.
• The barrel is specified to fit Glock 21 pistols.
• The NFA thread specification is .578×28.
• The rate of twist is 1:10.
• The product type is listed as handgun barrel.
• The series is listed as Glock 21 Compatible.
• The barrel material description is stainless steel.
• The color/finish is listed as black nitride.
• The barrel style is threaded.
• The UPC is 817272012019.

This barrel is engineered to provide a durable, serviceable mounting point for suppressors and other muzzle accessories while maintaining the simple, rugged function expected from purpose-built replacement barrels. Its construction and finish make it suitable for regular range use and competition settings where threaded barrels and suppressor setups are required.