DPM "Adjustable System" for Glock 20L Gen 3

DPM Mechanical Recoil Reduction System | Glock 20L (Gens 1–3)

Overview: The DPM Mechanical Recoil Reduction System for the Glock 20L (Generations 1–3) is a direct-replacement, multi-spring recoil rod engineered to reduce felt recoil, protect slide and frame components, and deliver faster follow-up shots. This kit is fully tunable with multiple external spring sets and includes a mandatory washer for proper operation. Backed by a lifetime warranty.

Compatibility

• Fits: Glock 20L Generations 1, 2, and 3.
• Fitment note: Direct drop-in replacement for the factory recoil rod on compatible models; no permanent modifications required.

What’s Included

• 1 × DPM captured recoil rod (preinstalled safety pin)
• 1 × Washer installed on rod (MANDATORY to install during use)
• 1 × Spare washer
• 3 × Sets of external springs (soft / medium / heavy sets; each set contains short & long lengths)
• Installation instructions and lifetime warranty information

Important Notice

Always use the included washer. The washer (buffer) is mandatory and must be installed for safe and correct operation. Failure to install the washer may cause improper function or damage.

How It Works

DPM’s multi-spring design places multiple springs in series and/or parallel to control slide travel at both the closed (battery) and full-open positions. External spring selection changes the slide-in-battery (closed) force; the washer controls the buffering at full slide extension. By mixing springs and spacers you can fine-tune the recoil impulse to match ammunition, compensators, or shooter preference.

Power Rates (Slide in Battery : idle position)

• Soft Springs (1.05 mm wire):
  • Short spring: 4.0 kg / 8.8 lbs
  • Long spring: 4.3 kg / 9.5 lbs
• Medium Springs (1.10 mm wire):
  • Short spring: 4.2 kg / 9.25 lbs
  • Long spring: 4.5 kg / 9.9 lbs
• Heavy Springs (1.15 mm wire):
  • Short spring: 4.4 kg / 9.7 lbs
  • Long spring: 4.7 kg / 10.36 lbs
• Slide full open (total buffer force): ~13.6 kg / 30 lbs (approx.)

Key Benefits

• Reduced felt recoil for faster sight recovery and improved control.
• Smoother follow-up shots — enhanced shot-to-shot consistency.
• Slide & frame protection — buffered travel minimizes impact at full extension.
• Customizable tuning — multiple spring sets let you match ammo and accessories.
• Lifetime warranty — manufacturer coverage for defects.

Installation & Tuning Tips

• Always ensure the firearm is unloaded and safe before beginning installation.
• Install the supplied washer (mandatory) before test firing.
• Start testing with the medium/short spring combination, then move to softer or heavier springs depending on recoil feel and reliability with your ammunition.
• If using compensators, ported slides, or specialty ammo, verify function after each change and consult DPM or a qualified gunsmith if unsure.

Technical Summary

• Product Type: Mechanical recoil reduction system (captured rod)
• Compatible Models: Glock 20L (Gens 1–3)
• Adjustability: 3 spring sets (soft / medium / heavy) with short & long options; washer (mandatory)
• Typical Closed Force Range: ~8.8–10.36 lbs (per spring)
• Typical Full-Open Total Force: ~30 lbs (approx.)
• Origin: Made in Greece / EU
• Warranty: Lifetime

For specialized setups (suppressors, threaded barrels, compensators, or non-standard ammunition), contact DPM or a qualified gunsmith to confirm the correct spring/washer configuration for optimal reliability.