This system works due to the multi spring intricate rod (three springs) and controls the functionality of the pistol. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame.
The slide extended system is an innovation of DPM Systems Technologies and it is available only for the subcompact pistols.
A plug (bushing) is used in cooperation with the DPM recoil system so as to create more space in the slide of subcompact pistols so these models can accommodate the DPM Mechanical recoil reduction system.
Also accompanying this system are two separate springs so the shooter can fine-tune the weapon for his/her personal standards.The longer spring (more coils) is stronger and has a heavier pound rating than the shorter spring.