Sphinx SDP Compact Staccato the long spring is heavy

the long spring is heavy and the short is light so the shooter can fine-tune the pistol on the opening and locking position (slide on the battery) according to your personal standards

Aluminum Version

OR) 4″ Barrel Open

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

Sphinx SDP Compact Staccato the long spring is heavyDPM Mechanical Recoil Reduction System for Sphinx SDP Compact This system works due to the multi spring intricate rod (3 springs) and controls the functionality of the gun. The third spring, which is contained within the rod, controls the movement of the slide so it never rams on the frame. Included with the system are 3 separate springs so the user can fine tune the weapon for his hers personal standards. The longer spring (more coils) is stronger