Grip Plug for Glock 21 Gen 4 – Compatibility Guide

1 min read

Grip Plug for Glock 21 Gen 4 – Compatibility Guide

Why upgrading your grip plug matters for the Glock 21 Gen 4

When you’re on the line, precision matters. A quality grip plug enhances balance and control. It keeps dust and debris out of your grip cavity, ensuring reliability and smooth operation. You’ll notice the difference with every shot.

The Glock 21 Gen 4 is a powerhouse. Known for duty and competition, it’s a favorite for those who demand full-size power and reliability. You’ve chosen a heavy hitter that handles like a dream.

Upgrading to an NDZ grip plug means improved firearm performance and feel. Our plug is designed for perfect fitment, enhancing your control. Precision-machined from high-grade materials, it’s tougher and lighter than OEM.

Part SKU Part Name Firearm Model Compatible
NDZ-JP7 NDZ Glock Gen 4 Grip Frame Plug P7 G20 G21 G241 Glock 21 Gen 4 Yes — Verified

Get Yours from NDZ Performance

Precision-machined in the USA. Ships fast. Unleash your Glock’s potential.

View NDZ-JP7 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.