FN 509 3.7" Compact & 4" Midsize

DPM Adjustable Mechanical Recoil Reduction System for FN 509 3.7" Compact & 4" Midsize

This high-end tech system works due to the multi-spring intricate rod (2 springs) in combination with the 4 external springs  that work as buffer, and controls the functionality of the pistol.

 The system includes 4 external springs, 2 x 1.0 mm wire diameter and 2 x 1.15mm wire diameter, all with different power rates.

The soft springs are designed to serve threaded barrels and compensator modifications. 

Power Rates

Slide on the battery: 

Soft Springs 1.0mm

• Short:  9lbs
• Long:  10lbs 

Strong Springs 1.15mm 

• Short: 10lbs
• Long:  11lbs

Slide full open position (approx.):

 Soft Springs

• Short: 16lbs
• Long:  17lbs 

Strong Springs 

• Short: 18lbs 
• Long:  20lbs  

 Overall Advantages

• Faster follow up shots
• Improved firing speed
• Slide and Frame Protection
• Elimination of jams
• Significant recoil reduction
• Better double-tap concentration
• Better control and greater accuracy

How it works

Made in Greece – EU.

• E-shop / Recoil Reduction Systems for Pistols / Fn Herstal