DPM Recoil Reduction System for FN Herstal FNP / FNS / FNX 4" Barrel – 9mm / .40 S&W
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UPC: 5213007220813

DPM Recoil Reduction System for FN Herstal FNP / FNS / FNX 4" Barrel – 9mm / .40 S&W

Your FNX, FNS, or FNP deserves a barrel that matches its reputation for reliability. This 4" barrel is precision-machined from high-grade steel and built to factory specifications, making it the ideal replacement or upgrade for your FN pistol. Whether you’re restoring an older pistol or fine-tuning performance, this barrel delivers accuracy, durability, and consistency you can count on.

Power Rates

Slide in the battery

• Short Spring: 9lbs
• Long Spring: 11lbs

 Slide in full open position

Total power: 23lbs (approx.)   

Key Features

• Fits FNP, FNS, and FNX Pistols: Designed for compatibility with full-size 9mm and .40 S&W models.

• OEM-Level Precision: Built to original factory dimensions for seamless fit and reliable function.

• Durable Steel Construction: Forged from high-strength steel for long service life.

• Optimized Performance: Maintains accuracy, cycling, and reliability across thousands of rounds.

• Drop-In Replacement: No gunsmithing required, installs with your existing slide and recoil assembly.

Why Choose This FNX / FNS / FNP Barrel

Replacing or upgrading your barrel is one of the easiest ways to extend the life and performance of your pistol. This 4" barrel is engineered for shooters who want reliability without compromise. It preserves factory handling characteristics while giving you confidence in accuracy and long-term wear resistance. Perfect for everyday carry, range training, or duty use.

Installation Notes

• Compatible with FNX, FNS, and FNP full-size models chambered in 9mm or .40 S&W.

• Direct drop-in installation—no modifications needed.

• Always test function and re-zero after installing a new barrel.

FAQ

Will this barrel fit all FNX pistols?
This barrel is designed for FNX full-size models chambered in 9mm and .40 S&W. It will not fit compact versions.

Can I use this barrel to convert my pistol from .40 S&W to 9mm?
No. This barrel is caliber-specific. To change calibers, you’ll need a conversion kit designed for your pistol.

Do I need a gunsmith to install it?
No. It is a true drop-in replacement and installs easily with your existing slide and recoil spring assembly.

How does it compare to aftermarket barrels?
This barrel matches OEM specifications, ensuring proper fit and function. Many aftermarket barrels alter dimensions, which can affect reliability.

Is it threaded for suppressors?
No. This is a standard 4" replacement barrel, not threaded. If you need a threaded barrel for suppressor use, select the threaded version designed for FN pistols.