Slide Lock Lever for Glock 21 Gen 3 – Compatibility Guide

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Slide Lock Lever for Glock 21 Gen 3 – Compatibility Guide

Why upgrading your slide lock lever matters for the Glock 21 Gen 3

The Glock 21 Gen 3 is a workhorse, a favorite in duty, competition, and concealed carry. It delivers consistent performance and reliability under pressure. You already know how it feels on the range, delivering power and accuracy.

Shooters upgrade their slide lock lever for enhanced reliability and better feel during operation. NDZ’s slide lock lever is precision-machined, guaranteed to outperform factory parts. Reduced wear, faster engagement, and a tactile feel. It’s not just about replacement; it’s about upgrading your firearm.

Part SKU Part Name Firearm Model Compatible
JEN-ESLL-17-BLK Jentra Glock Gen 1-4 Extended Slide Lock Lever, Black Glock 21 Gen 3 Yes — Verified

Get Yours from NDZ Performance

Precision-machined in the USA. Ships fast. View JEN-ESLL-17-BLK on NDZ Performance

NDZ Performance is a U.S.-based manufacturer of aftermarket firearm accessories and parts, founded by David Dziob and Antonin Blazek in 2004 and headquartered in Wallingford, Connecticut. Operating a fully equipped in-house CNC shop with 3D printing, CNC milling, lathes, and laser engraving, NDZ produces custom and performance upgrade parts for Glock, Sig Sauer, Smith & Wesson, Springfield Armory, Ruger, CZ, Beretta, Mossberg, Remington, AR-15, AK-47, and more — including guide rods, custom slides, slide cover plates, and magazine base plates. Articles on this blog share product insights, installation guides, and real-world testing to help shooters make informed upgrade decisions.