MPX-SD K Conversion Service

Not yet rated

(3)

$1,800.00

3 in stock

During checkout, please ensure that you select an FFL (Federal Firearms Licensee) that permits suppressor transfers (SOT). Failure to do so may result in an additional $25 processing fee for us to arrange an eligible FFL on your behalf.
Military and LEO, please contact us to claim your 5% discount.

MPX-SD K Conversion Service – The Ultimate Integrally Suppressed Upgrade for Your MPX-K

Build Time: 4–6 Weeks | Precision-Crafted | Made in the USA


✅ Why Upgrade Your MPX-K with Ronin Arms?

The SIG MPX-K is one of the most innovative PCC platforms in the world, but when you want whisper-quiet suppression with uncompromising reliability, nothing beats the Ronin Arms MPX-SD K Conversion.

This service transforms your MPX-K into a fully integrally suppressed system, engineered for professional shooters, law enforcement, and serious firearm enthusiasts who demand elite performance.

Industry-Leading Suppression
Flawless Cycling & Reduced Recoil
Live-Fire Tested for Reliability


🔊 Experience the Ronin Arms Difference

At Ronin Arms, we don’t cut corners. Every MPX-SD K conversion is:
✔ Built by one gunsmith, one at a time
✔ Precision-machined for perfect alignment
✔ Finished with live-fire testing to ensure reliability


🛠 What’s Included in the MPX-SD K Conversion?

✔ 5.75″ Ronin Arms Ported SD Barrel

Velocity Reduction Technology – Converts 115gr & 124gr ammo to subsonic speeds
✔ Eliminates the need for 147gr subsonic ammo
Optimized for Accuracy & Recoil Control
18 x 1 Rear Thread Pitch for perfect fit


✔ 8″ Wakizashi Titanium SD Suppressor – Fully Integrated & Ultrasonic Compatible

✔ Aerospace-grade Titanium Construction – Ultra-light and incredibly strong
Extended Service Life – Built to last 400,000–500,000 rounds under normal use
Low Maintenance Design – No internal cleaning required; compatible with ultrasonic cleaners for external care
Whisper-Quiet Performance – Industry-leading suppression with minimal blowback
Engineered for Reliability – Built for extreme use without compromising performance


✔ Precision Receiver Machining

✔ Ensures flawless barrel and suppressor alignment
✔ Guarantees consistent accuracy and smooth cycling


✔ Expert Barrel Installation

✔ Professionally fitted for durability and reliability
✔ Tested under live-fire conditions before shipping


⚠ Compatibility – Is Your MPX Ready for This Upgrade?

Compatible with SIG MPX Gen1, Gen2, and Gen3 models
❌ NOT compatible with monolithic upper receivers (including Copperhead Monolithic)


🔧 Recommended Handguard Upgrade – Midwest Industries 8″ Handguard

Lightweight & Rugged Construction
M-LOK Compatible for accessories
Optimized Fit for MPX-SD K Builds

Important: If adding accessories, screw length may need modification for proper fitment.


📦 How to Send Your MPX for Conversion

Include Printed Order Receipt – Orders without documentation will be returned
Ship ONLY the barreled upper receiver – Extra parts incur $50 handling fee (not guaranteed to return)
✔ We will process a Form 3 transfer for your suppressor
✔ Complete your Form 4 at your FFL


🔊 Suppressor Maintenance & Warranty

Non-Serviceable Design – Rated for 400,000–500,000 rounds
Ultrasonic Cleaner Compatible for external care
✔ Contact Ronin Arms for authorized service when needed
Do NOT attempt disassembly – Tampering voids warranty


💯 Ronin Arms Warranty

✔ Covers defects in materials & craftsmanship
✔ Repair or replacement at Ronin Arms’ discretion
❌ Does not cover misuse, neglect, or unauthorized modifications


⚙ Installation & Removal Guidelines

🚨 DO NOT FIRE WITHOUT THE SUPPRESSOR ATTACHED – Catastrophic damage may occur
✔ Hand-tighten only – Do NOT over-torque
✔ Allow suppressor to cool before removal


⏳ Build Time & ATF Notes

Turnaround Time: 4–6 weeks (quality takes time)
ATF Form 3 Transfer Required – Wait times are beyond our control
Status calls will NOT speed up the process


🔐 Refund & Cancellation Policy

  • No refunds once suppressor Form 3 transfer has been initiated

  • All cancellations subject to a 20% restocking fee


✅ Why Ronin Arms MPX-SD K?

True Integral Suppression – Whisper-quiet performance
Extended Suppressor Life – 400K–500K rounds
Premium Titanium Construction – Lightweight, durable, and heat-resistant
One Gun, One Gunsmith – No shortcuts, no compromises


🔥 Upgrade Your MPX-K Today!

Don’t settle for factory performance—unlock elite suppression, precision, and control with Ronin Arms MPX-SD K Conversion Service.

🚀 Experience the future of integrally suppressed firearms.
👉 Order your conversion now and join the Ronin Family!

📩 Questions? Email info@roninarmsaz.com
📌 Tag your build: #RoninArms #RoninFamily

Barrel Length

4.75"

Suppressor Length

8"

  1. Jeffrey L.

    Purchase to range in less than 30 days during the holiday season. Gun runs flawlessly and is “Hollywood” quiet. I am so impressed with this setup I just bought another MPX and will be ordering the full-size setup. A++++ 5 Stars!

    Great Job Brother!!!!

  2. Bryan F.

    If you don’t absolutely LOVE it, there is something wrong with you.
    Quality work resulting in superior performance. I would not hesitate to do this again, as a matter of fact I’m debating a second one.
    Sound suppression is phenomenal, especially when compared to end of barrel suppression. Night and day; don’t want, just get it. You know the saying, buy once cry once.

  3. JT

    Also, I would like to thank you and your team for the incredible work you guys did! After shooting the MPX last weekend for the first time since the modifications, I can confidently say it’s become my favorite gun—quite a statement considering my collection.

    I truly appreciate all your help throughout the process.

    Wishing you a great day ahead!

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