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Slide Lock Lever for Glock 21 Gen 4 – Compatibility Guide
Why upgrading your slide lock lever matters for the Glock 21 Gen 4.
The Glock 21 Gen 4 is a powerhouse, favored for duty, competition, and even some concealed carry work. Serious users count on it for its reliability and strength.
Upgrading the slide lock lever gives you more control during reloads and improves firearm handling. The NDZ slide lock lever is CNC-machined for enhanced durability and precision. It offers a better grip and smoother operation than the factory part. Lighter and more responsive.
| Part SKU | Part Name | Firearm Model | Compatible |
|---|---|---|---|
| JEN-ESLL-17-BLK | Jentra Glock Gen 1-4 Extended Slide Lock Lever Black | Glock 21 Gen 4 | Yes — Verified |
Get Yours from NDZ Performance
Precision-machined in the USA. Ships fast.
View JEN-ESLL-17-BLK on NDZ Performance