This recoil spring system from DPM is designed to use 3 springs for dampening instead of just 2 like the original Glock recoil spring.
This third spring creates additional counterpressure just before the bolt hits the locking block, which slows the bolt down.
This is clearly visible after installation, even when empty when manually reloading the Glock .
Especially interesting for reloaders - the version for the Glock 17 or Glock 22 Gen 5 includes 3 different adapters for the bolt, which either increase or reduce the strength of the bolt spring depending on the size/length.
The DPM system offers the following advantages:
Increase in the service life of the weapon or reduce wear due to lower load
Reduction of recoil
General improvement of repetition behavior and thus avoidance of feeding problems
Better control of the pistol and thus faster firing sequences
When using a red dot sight, the service life is increased as it is also subjected to less stress
