Description

Upgrade your Glock with a purpose-built threaded barrel designed for the .45 Auto platform. The Threaded Barrel G21 Gen4 LH is precision-machined to fit Glock G21 Gen3 and Gen4 pistols and features an M16 x 1 LH metric thread pattern for seamless compatibility with a wide range of suppressors and muzzle devices. Constructed from premium steel and finished for corrosion resistance, this barrel balances long-term durability with the tight tolerances necessary for consistent accuracy. While supplies last. Please note: Not compatible with G21 Gen5.

Whether you’re running a suppressed training rig, building a duty carry pistol, or simply upgrading for improved consistency and longevity, this threaded barrel delivers dependable performance without compromise. The included metal thread protector safeguards the threads when a muzzle device is not attached, preventing damage during storage or transport and preserving the precision fit you expect from a quality replacement barrel.

This barrel is engineered to meet the expectations of the serious shooter: clean aesthetics, repeatable accuracy, and rock-solid reliability under typical range and duty conditions. Rifling and chamber dimensions are held to tight tolerances for optimal bullet stabilization and consistent point of impact when compared to worn or mismatched factory barrels. The left-hand M16 x 1 thread configuration follows metric standards commonly used with .45 Auto suppressors and compensators, enabling easy integration with your existing gear.

Key benefits & features:

• Suppressor-ready reliability (Benefit) — M16 x 1 LH metric threading ensures proper alignment with suppressors and muzzle devices (Feature: precision-cut left-hand threads for minimised play and repeatable fitment).

• Preserves thread integrity between uses (Benefit) — Includes a robust metal thread protector to prevent damage and wear during storage and transport (Feature: machined metal protector that threads easily on/off while protecting thread roots).

• Improved accuracy and longevity (Benefit) — Precision machining and tight tolerances provide consistent chambering and improved groupings over time (Feature: cold-finished steel construction and quality rifling for repeatable performance).

Compatibility & notes: Fits Glock G21 Gen3 and Gen4 (.45 Auto). Not compatible with G21 Gen5. Check your model before purchasing to ensure correct fitment.