Factory Glock threaded barrel for G21 Gen3 and Gen4 models. 578x28 right-hand threads with steel protector cap included.
Fits: Glock 21
This is an authentic Glock factory threaded barrel designed for the G21 platform. It provides the foundation for suppressor-ready shooting with your full-size .45 ACP pistol.
This barrel is a straightforward replacement component. Field stripping and barrel replacement on the G21 requires no special tools—simply follow standard Glock takedown procedures. The barrel will function with standard G21 recoil springs and components.