Recoil Spring for Glock 21 Gen 5 – Compatibility Guide

1 min read

Recoil Spring for Glock 21 Gen 5 – Compatibility Guide

Why upgrading your recoil spring matters for the Glock 21 Gen 5

The Glock 21 Gen 5 is a workhorse. Known for its power and reliability, it’s a favorite for duty and competition. With its robust .45 ACP chambering, it’s a force at the range or in a defensive scenario. Shooters upgrade the recoil spring to improve reliability and performance. A quality recoil spring ensures smoother cycling and reduced felt recoil. NDZ’s recoil spring offers superior durability and consistent performance, precision-machined for better action than the factory version.

Shop Recoil Spring for your Glock 21 Gen 5? Browse this part at NDZ Performance — ships from the US with fast processing.

Part SKU Part Name Firearm Model Compatible
ISMI-RS-13 13 lb Full Size Recoil Spring for Glock Glock 21 Gen 5 Yes — Verified

Get Yours from NDZ Performance

Precision-machined in the USA. Ships fast.

View ISMI-RS-13 on NDZ Performance
How do I install the ISMI-RS-13 recoil spring?

Follow your Glock 21 Gen 5 manual instructions for recoil spring replacement. It fits securely without modification.

Is the recoil spring compatible with other Glock generations?

This recoil spring is specifically for the Glock 21 Gen 5. For other generations, check specific compatibility.

What’s included with the purchase?

You’ll receive one 13 lb recoil spring, precision-engineered for your Glock 21 Gen 5.

How does this compare to the OEM recoil spring?

NDZ’s spring offers enhanced performance with more consistent cycling and reduced recoil than OEM.

Ready to upgrade your Glock 21 Gen 5? Get your Recoil Spring at NDZ Performance and experience the difference quality aftermarket parts make.

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.