GLOCK 40 GEN 4 10mm 40s&w The system includes 2 external

The system includes 2 external springs

The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame

What they don’t mention is what occurs when their lube exceeds their flash point

Our TRUE BLUE Gun Oil has a very low coefficient of friction

GLOCK 40 GEN 4 10mm 40s&w The system includes 2 externalDPM MRS for Glock 40 Gen 4 10mm 6 Barrel This DPM Mechanical Recoil System functions due to the multi spring intricate rod (3 springs). The third spring, which is contained within the rod, controls the movement of the slide so it never rams on the frame. The system includes 3 different in length washers and 2 external springs. Washers differentiate only the buffer force (slide full open position) and the external springs differentiate only the slide