Trigger Connector And Spring Kit for Glock 21 Gen 4 – Compatibility Guide

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Trigger Connector And Spring Kit for Glock 21 Gen 4 – Compatibility Guide

Why upgrading your trigger connector and spring kit matters for the Glock 21 Gen 4

Your Glock 21 Gen 4 is a beast of a firearm. Known for its power, versatile in duty or competition, it’s designed for those who demand performance. You’re familiar with what it can do, but you recognize that there’s always room to push the boundaries.

Upgrading the trigger connector and spring kit immediately enhances your shooting experience. With NDZ’s precision-engineered kit, you get smoother trigger pulls, increased reliability, and a crisper break, outperforming OEM parts. This isn’t just an upgrade — it’s an enhancement of your entire shooting setup.

Part SKU Part Name Firearm Model Compatible
GHO-GLK-TC-MAR-GHO-SK-COMP-1 Ghost Marine 3.5 Connector & Competition Spring Kit Glock 21 Gen 4 Yes — Verified

Get Yours from NDZ Performance

Precision-machined in the USA. Ships fast. Own the range with NDZ quality. View GHO-GLK-TC-MAR-GHO-SK-COMP-1 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.