Description DPM MRS for Glock 19-19x-23-32-45 Gen 4&5 This system works due to the multi-springs intricate rod (3 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 system includes 2 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 closed position (slide on the battery). The shorter washer offers a light buffer effect and the longest washer offers the heaviest buffer effect. The external springs are different in length with the longer offering heavier slide travel and locking than the shorter spring.  This DPM Mechanical Recoil Reduction System is a direct replacement for the stock recoil rod and does not change the configuration of the pistol. As always, DPM products are designed and developed with user’s safety as a priority. Exceptional manufacturing and engineering using high-end materials. National Tactical Officers Association Tested & Recommended. *B.O.S.S : Black Oxide Stainless Steel  its an innovative coating technology applied usualy on the visible parts of the recoil system. Power Rates Slide in battery (idle position) Short Spring: 4kgs / 8.6 lbs Long Spring: 4,2kgs / 9.25Lbs Slide full open position Short Spacer: 10.5kgs / 23 lbs (approx.) Long Spacer: 11.5kgs / 25.3 lbs (approx.)   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 DPM MRS Installation Instructions For changes to features, like comp set-up, threaded barrels, slide conversions etc., contact us via email at info@dpmsystems.com before placing your order. In some cases, we need to determine whether a custom product is required. Made in Hellas – EU. Millions of our patented products are in service to military and law enforcement pistols and sports shooter’s pistols around the world. Lifetime Warranty for unlimited usage rounds. DISCLAIMER: This product is not manufactured, authorized, endorsed,or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.