DPM Systems Sig P320 M18 California - Standard Version

DPM Mechanical Recoil Reduction System | SIG P320 M18 (California Standard Version)

Overview: The DPM Mechanical Recoil Reduction System for the SIG P320 M18 (California — Standard Version) is a direct-replacement captured recoil rod designed to reduce felt recoil, protect slide/frame components, and improve follow-up shot speed. This kit requires the included spring plug to be installed for correct operation and is backed by DPM’s lifetime warranty.

Compatibility

• Fits: SIG P320 M18 — California (Standard Version).
• Fitment note: Drop-in replacement for the factory guide/recoil rod; no permanent modifications required when used with compatible pistols.

What’s Included

• Captured DPM recoil rod (direct replacement)
• Spring plug (must always be installed)
• Multiple springs (short / medium / long) for tuning — see power rates below
• Installation instructions and lifetime warranty information

Important Notice

Always install the included spring plug. The spring plug is mandatory when using the DPM rod and springs; omitting it may cause improper function or damage.

Power Rates (Slide in Battery — Closed)

• Short spring: 3.5 kg / 7.71 lbs
• Medium spring: 3.8 kg / 8.37 lbs
• Long spring: 4.1 kg / 9.03 lbs
• Slide full open (total buffer force): 7.5 kg / 16.53 lbs (approx.)

Key Benefits

• Reduced felt recoil for faster sight recovery and improved shot-to-shot control.
• Smoother follow-up shots and improved firing speed.
• Slide & frame protection — buffered travel minimizes impact at full extension.
• Customizable tuning — choose short / medium / long springs to match ammunition and accessories.
• Lifetime warranty included for manufacturing defects.

Installation & Tuning Tips

• Always make the firearm safe and unloaded before installing.
• Install the supplied spring plug before test firing — it is mandatory for correct function.
• Begin testing with the medium spring; move to short (softer) or long (stiffer) spring based on recoil feel and reliability with your ammunition.
• After changes (ammo type, compensator, threaded barrel, etc.), confirm function with multiple test rounds and consult DPM or a qualified gunsmith if needed.

Technical Summary

• Product Type: Mechanical recoil reduction system (captured rod)
• Compatible Models: SIG P320 M18 (California — Standard Version)
• Adjustability: Short / Medium / Long spring selections; spring plug required
• Closed Force Range (per spring): ~7.71–9.03 lbs
• Full-Open Buffer Force: ~16.53 lbs (approx.)
• Origin: DPM — Made in Greece / EU
• Warranty: Lifetime

For special configurations (suppressors, compensators, non-standard ammo or slide modifications), contact DPM or a qualified gunsmith to determine the optimal spring/plug setup for reliability and safety.