DPM Systems "Adjustable" System for Glock 40 Gen 4

DPM MRS | Adjustable Recoil Reduction System for GLOCK 40 Gen4 (10mm, 6")

Overview: The DPM Mechanical Recoil Reduction System (MRS) for the GLOCK 40 Gen4 10mm (6" barrel) is a captured, adjustable multi-spring recoil rod designed to smooth slide travel, reduce felt recoil, and protect the slide/frame. With 9 user-adjustable settings (via three buffer washers and three external springs), this kit lets you fine-tune performance for factory, heavy, or specialty ammunition.

Compatibility

• Fitment: GLOCK 40 Gen4 | 10mm, 6" barrel (verify model details before ordering).

What’s Included

• 1 × DPM captured adjustable recoil rod (drop-in style)
• 3 × external springs (short / medium / long)
• 3 × stainless steel buffer washers (black oxide finish)
• Installation instructions and lifetime warranty information

How It Works

DPM’s MRS uses a multi-spring rod design where the external springs control slide behavior when the slide is in battery (closed), and the interchangeable buffer washers control the buffer force when the slide reaches full-open position. Combine any spring with any washer to create 9 distinct settings so you can tune for recoil impulse, follow-up speed, and frame/slide protection.

Power Rates (Typical)

• Slide in battery (closed) — external spring force:
  • Short Spring: ~10 lbs
  • Medium Spring: ~11 lbs
  • Long Spring: ~12 lbs
• Slide full open (total buffer force) — washer selection:
  • Short Washer: ~22 lbs
  • Medium Washer: ~26 lbs
  • Long Washer: ~30 lbs

Key Benefits

• Adjustable recoil tuning — 9 user settings to match ammunition and use case.
• Smoother follow-up shots — reduced muzzle flip and faster sight recovery.
• Slide & frame protection — buffered slide travel reduces mechanical impact wear.
• Reliability — engineered to eliminate binding and reduce jams across setups.
• Lifetime warranty — manufacturer coverage against defects.

Installation & Tuning Notes

• Always ensure the firearm is unloaded and follow safe-handling procedures prior to installation.
• Drop-in replacement for the factory recoil rod in compatible models — minimal/moderate skill required.
• Start with the short washer + medium spring for a balanced setup; test-fire and adjust to taste.
• If you run compensators, ported slides, suppressors, or specialty ammo, verify function after each change and consider trying heavier washer/spring combinations for optimal protection and reliability.
• Product designs and included hardware may change; inspect the kit on receipt and follow the supplied instructions.

Technical Summary

• Product Type: Captured adjustable recoil reduction system
• Fitment: GLOCK 40 Gen4 (10mm, 6" barrel)
• Settings: 9 adjustable user settings (3 springs × 3 washers)
• Materials: Stainless steel washers (black oxide finish), DPM springs & rod components
• Warranty: Lifetime (manufacturer)

Questions about compatibility with modified slides, threaded barrels, or suppressor setups? Contact the manufacturer or a qualified gunsmith before installation to confirm the correct configuration for your firearm.