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Recoil Spring for Glock 21 Gen 3 – Compatibility Guide
Why upgrading your recoil spring matters for the Glock 21 Gen 3
The Glock 21 Gen 3 is your go-to for power and accuracy. Whether you use it for duty, competition, or concealed carry, you know its strengths. You own it because it performs. Now, make it better.
Shooters upgrade their recoil springs for a more reliable cycling, better control, and reduced felt recoil. NDZ’s 13 lb recoil spring enhances these aspects, ensuring your Glock performs smoothly every time. It’s 20% lighter than OEM, precision-engineered to outlast and outperform.
| Part SKU | Part Name | Firearm Model | Compatible |
| ISMI-RS-13 | ISMI Glock Gen 1-4 Recoil Spring 13 lb Full Size | Glock 21 Gen 3 | Yes — Verified |
Get Yours from NDZ Performance
Precision-machined in the USA. Ships fast. View ISMI-RS-13 on NDZ Performance