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DPM Systems Technologies USA INC

Walther Q4 Steel & Polymer Frames (TAC/M2, OR) 4″ Barrel Open



DPM Mechanical Recoil Reduction System Walther Q4 Steel & Polymer Frames (TAC/M2, OR) 4″ Barrel Open

This DPM System works with six different buffer recoil springs which each one offers different spring force (Forces are listed at the end of the description).

The System is included with 3 external springs, 6 recoil springs and a safety pin.

The longer spring (more coils) is stronger and has a heavier pound rating than the shorter spring.

Feel free to try any possible combination of the external and buffer springs to fine tune the pistol function depending the power of the ammunition is used and according to your personal standards.

ATTENTION: Read installation instructions before use.


Buffer Spring: 0.7mm Soft                                                

Short:        8.0 kg/ 17 lbs

Medium:  9 kg/ 19.8 lbs

Long:        10 kg/ 22 lbs


Buffer Spring: 0.8mm Strong

Short:          9.0 kg/ 20 lbs

Medium:   10.5 kg/ 23 lbs

Long:          11.5 kg/ 26 lbs

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