Glock 21 Gen3/Gen4 .45 ACP Threaded Barrel
Genuine Glock 21 replacement barrel with M16x1 left-hand metric threading for .45 ACP. Includes steel thread protector. Compatible with Gen3 and Gen4 models.
Fits: Glock 21
Glock 21 Threaded Barrel for .45 ACP
This is a genuine Glock factory replacement barrel engineered for the Glock 21 platform in .45 ACP. The barrel features M16x1 left-hand metric threading, which allows you to attach suppressors and other threaded accessories designed for this specification.
Key Features
- Caliber: .45 ACP
- Thread Pattern: M16x1 left-hand metric
- Compatibility: Glock 21 Gen3 and Gen4
- Material: Black steel construction
- Included: Steel thread protector
What You Need to Know
This is a drop-in replacement barrel for your Glock 21. The threading allows you to run a suppressor or other compatible muzzle devices. The included thread protector keeps the threads clean and protected when not in use. Installation is straightforward—simply field strip your pistol and swap out the original barrel.
The M16x1 metric threading is a common standard for .45 ACP suppressors, giving you flexibility in accessory selection. Whether you're building a suppressed .45 or simply want the option to do so, this barrel delivers genuine Glock quality and reliability.
